website: Minor text and style changes (#155)

This PR includes minor textual and styling updates across several
website pages, specifically the About, Blog, and Governance pages.

_pages/about.md

@@ -8,41 +8,39 @@ permalink: /about/
 
 The gem5 simulator is a modular platform for computer-system architecture research, encompassing system-level architecture as well as processor microarchitecture.
 
-gem5 is an open source computer architecture simulator used in academia and in industry.
-gem5 has been under development for the past 15 years initially at the University of Michigan as the m5 project and at the University of Wisconsin as the GEMS project.
-Since the [merger of m5 and GEMS in 2011](/publications/#original-paper), gem5 has been cited by over [2900 publications](https://scholar.google.com/scholar?cites=5769943816602695435).
-gem5 is used by many industrial research labs including ARM Research, AMD Research, Google, Micron, Metempsy, HP, Samsung, and others.
+gem5 is an open-source computer architecture simulator used in both academia and industry.
+It has been in development for the past 15 years, initially at the University of Michigan as the m5 project and at the University of Wisconsin as the GEMS project.
+Since the [merger of m5 and GEMS in 2011](/publications/#original-paper), gem5 has been cited in over [2900 publications](https://scholar.google.com/scholar?cites=5769943816602695435).
+Many industrial research labs, including ARM Research, AMD Research, Google, Micron, Metempsy, HP, Samsung, and others, use gem5.
 
+---
 
 ## Features
 
-### Multiple interchangeable CPU models.
+#### Multiple interchangeable CPU models.
 gem5 provides four interpretation-based CPU models: a simple one-CPI CPU; a
 detailed model of an in-order CPU, and a detailed model of an out-of-order CPU.
 These CPU models use a common high-level ISA description. In addition, gem5
 features a KVM-based CPU that uses virtualisation to accelerate simulation.
 
-### [Event-driven memory system.](/documentation/general_docs/memory_system)
-gem5 features a detailed, event-driven memory system including caches,
+#### Event-driven memory system.
+gem5 features a detailed, [event-driven memory system](/documentation/general_docs/memory_system) including caches,
 crossbars, snoop filters, and a fast and accurate DRAM controller model, for
 capturing the impact of current and emerging memories, e.g. LPDDR3/4/5, DDR3/4,
 GDDR5, HBM1/2/3, HMC, WideIO1/2.  The components can be arranged flexibly,
 e.g., to model complex multi-level non-uniform cache hierarchies with
 heterogeneous memories.
 
-### [Multiple ISA support](/documentation/general_docs/architecture_support)
-gem5 decouples ISA semantics from its CPU models, enabling effective support
-of multiple ISAs. Currently gem5 supports the Alpha, ARM, SPARC, MIPS, POWER,
-RISC-V and x86 ISAs. However, all guest platforms aren't
-supported on all host platforms (most notably Alpha requires
-little-endian hardware).
+#### Multiple ISA support
+gem5 decouples ISA semantics from its CPU models, enabling effective [support of multiple ISAs](/documentation/general_docs/architecture_support). Currently gem5 supports the Alpha, ARM, SPARC, MIPS, POWER, RISC-V and x86 ISAs. 
+However, all guest platforms aren't supported on all host platforms (most notably Alpha requires little-endian hardware).
 
-### Homogeneous and heterogeneous multi-core
+#### Homogeneous and heterogeneous multi-core
 The CPU models and caches can be combined in arbitrary topologies, creating
 homogeneous, and heterogeneous multi-core systems. A MOESI snooping cache
 coherence protocol keeps the caches coherent.
 
-### Full-system capability
+#### Full-system capability
   - **ARM**: gem5 can model up to 64 (heterogeneous) cores of a
         Realview ARM platform, and boot 
 	[unmodified Linux](/documentation/general_docs/fullsystem/building_arm_kernel) and
@@ -61,52 +59,48 @@ coherence protocol keeps the caches coherent.
         We have also booted HP/Compaq's Tru64 5.1 operating system in
         the past, though we no longer actively maintain that capability.
 
-### Application-only support
+#### Application-only support
 In application-only (non-full-system) mode, gem5 can execute a variety of
 architecture/OS binaries with Linux emulation.
 
-### Multi-system capability
+#### Multi-system capability
 Multiple systems can be instantiated within a single simulation process. In
 conjunction with full-system modeling, this feature allows simulation of entire
 client-server networks.
 
-### Power and energy modeling
+#### Power and energy modeling
 gem5’s objects are arranged in OS-visible power and clock domains, enabling a
 range of experiments in power- and energy-efficiency. With out-of-the-box
 support for OS-controller Dynamic Voltage and Frequency (DVFS) scaling, gem5
 provides a complete platform for research in future energy-efficient systems.
 However, the existing DVFS documentation is out of date. You can find this page 
 at the [old wiki](http://old.gem5.org/Running_gem5.html#Experimenting_with_DVFS).
 
-### [A trace-based CPU](/documentation/general_docs/cpu_models/TraceCPU)
-CPU model that plays back elastic traces, which are dependency and timing
-annotated traces generated by a probe attached to the out-of-order CPU model.
-The focus of the Trace CPU model is to achieve memory-system (cache-hierarchy,
-interconnects and main memory) performance exploration in a fast and reasonably
-accurate way instead of using the detailed CPU model.
-
-### [Co-simulation with SystemC.](http://old.gem5.org/wiki/images/4/4c/2015_ws_09_2015-06-14_Gem5_ISCA.pptx)
-gem5 can be included in a SystemC simulation, effectively running as a
-thread inside the SystemC event kernel, and keeping the events and timelines
-synchronized between the two worlds. This functionality enables the gem5
-components to interoperate with a wide range of System on Chip (SoC) component
-models, such as interconnects, devices and accelerators. A wrapper for SystemC
-Transaction Level Modelling (TLM) is provided.
+#### A trace-based CPU
+CPU model that plays back elastic traces, which are dependency and timing annotated traces generated by a probe attached to the out-of-order CPU model.
+The focus of the [Trace CPU model](/documentation/general_docs/cpu_models/TraceCPU) is to achieve memory-system (cache-hierarchy, interconnects and main memory) performance exploration in a fast and reasonably accurate way instead of using the detailed CPU model.
 
-### [A NoMali GPU model.](http://old.gem5.org/wiki/images/5/53/2015_ws_04_ISCA_2015_NoMali.pdf)
-gem5 comes with an integrated NoMali GPU model that is compatible with the
-Linux and Android GPU driver stack, and thus removes the need for software
-rendering. The NoMali GPU does not produce any output, but ensures that
-CPU-centric experiments produce representative results.
+#### Co-simulation with SystemC.
+gem5 can be [included in a SystemC simulation](http://old.gem5.org/wiki/images/4/4c/2015_ws_09_2015-06-14_Gem5_ISCA.pptx), effectively running as a
+thread inside the SystemC event kernel, and keeping the events and timelines synchronized between the two worlds. 
+This functionality enables the gem5 components to interoperate with a wide range of System on Chip (SoC) component models, such as interconnects, devices and accelerators. 
+A wrapper for SystemC Transaction Level Modelling (TLM) is provided.
 
+#### A NoMali GPU model.
+gem5 comes with an integrated [NoMali GPU model](http://old.gem5.org/wiki/images/5/53/2015_ws_04_ISCA_2015_NoMali.pdf) that is compatible with the
+Linux and Android GPU driver stack, and thus removes the need for software rendering. 
+The NoMali GPU does not produce any output, but ensures that CPU-centric experiments produce representative results.
 
+---
 ## Licensing
+
 The gem5 simulator is released under a Berkeley-style open source license.
 Roughly speaking, you are free to use our code however you wish, as long as you
 leave our copyright on it. For more details, see the LICENSE file included in
 the source download. Note that the portions of gem5 derived from other sources
 are also subject to the licensing restrictions of the original sources.
 
+---
 ## Acknowledgments
 
 The gem5 simulator has been developed with generous support from several