Final Overview doc

relative links might
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Fixed relative links
Tweaked some words
WIP
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Change-Id: Id92c814832b0a765122e5c0e2487430486369d5f
Signed-off-by: Joshua Horton <joshh@us.ibm.com>

docs/overview.md

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+# Overview
+
+Hyperledger Fabric is a robust and flexible blockchain network architecture
+that provides enterprise-ready security, scalability, confidentiality and
+performance. Its unique implementation of distributed ledger technology ensures
+data integrity and consistency, while delivering accountability, transparency
+and efficiency. As a permissioned network, the fabric delivers a trusted
+blockchain network, where members are assured that all transactions can be
+detected and traced by authorized regulators and auditors.
+
+Hyperledger Fabric separates chaincode execution from transaction ordering,
+which limits the required levels of trust and verification across nodes,
+optimizing network scalability and performance. Private channels provide multi-
+lateral transactions with the high degree of privacy and confidentiality
+required for competing businesses and regulated industries to coexist on a
+common network. The fabric incorporates a modular approach to blockchain,
+enabling network designers to plug in their preferred implementations for
+components such as ordering, identity management and encryption.
+
+In total, Hyperledger Fabric delivers a uniquely comprehensive, elastic and
+extensible architecture, distinguishing it from the alternative blockchain
+solutions. Planning for the future of enterprise blockchain requires building
+on a fully-vetted, open architecture; Hyperledger Fabric is your starting point.
+
+**Attention**: The Hyperledger Fabric project team is continually working to
+improve the security, performance and robustness of the released software, and
+frequently publishes updates. To stay current as the project progresses, please
+see the **Communication** and **Still Have Questions?** topics. Your
+participation in Linux Foundation projects is welcomed and encouraged!