Non physics features

Benchmarks

• fix & improve navigator
• upgrade benchmark for not rerunning APFEL each and every time with sandbox
• write benchmarks for CC

timing

• integrate airspeed-velocity
  • example with numpy
  • more involved example with astropy
  • we need some pure running benchmarks (without APFEL, caching and everything) for the timing

Docs

• include tutorials with nbsphinx

Move to md

A possible tool to make writing docs easier is myst-parser, since it is providing the same tools of reST simply by extending md syntax (so it will be easier also for people new to python, or python-docs, to write and manage the docs)