Update project structure to follow the guidelines

[gcotelli]

Improve markdown linting
Fix some spell checking errors

[codecov]

Codecov Report

Merging #48 (bd08e78) into release-candidate (c87a5c4) will not change coverage.
The diff coverage is 100.00%.

@@                Coverage Diff                 @@
##           release-candidate      #48   +/-   ##
==================================================
  Coverage              99.62%   99.62%           
==================================================
  Files                     53       53           
  Lines                   2944     2944           
==================================================
  Hits                    2933     2933           
  Misses                    11       11           

Impacted Files	Coverage Δ
...very-Tests/NullServiceDiscoveryClientTest.class.st	100.00% <100.00%> (ø)

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