Create Readable Documentation

[hillmich]

• Streamline README.md
• Put elaborate documentation on ReadTheDocs

[codecov]

Codecov Report

Merging #39 (46e2948) into master (53a866b) will decrease coverage by 0.0%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master     #39     +/-   ##
========================================
- Coverage    88.5%   88.5%   -0.1%     
========================================
  Files          20      20             
  Lines        2389    2389             
========================================
- Hits         2116    2115      -1     
- Misses        273     274      +1     

Impacted Files	Coverage Δ
src/ShorSimulator.cpp	60.5% <0.0%> (-0.3%)	⬇️
src/ShorFastSimulator.cpp	94.4% <0.0%> (ø)

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[burgholzer]

As expected, the most critical comments are targeting the README.
The other stuff should be easy to incorporate.