added rockspec, fixed typo in filename
changed .txt to .md files
updated readme to md format
renamed docs to doc, to fix luarocks warning
added - a shameless copy of busted - CONTRIBUTING.md file
This is Penlight, not Busted
Merge pull request #1 from mark-otaris/patch-1

Caught red handed, after a shameless copy :smile:. Thx for the fix
Merge pull request #69 from Tieske/master

general updates, mainly added CONTRIBUTING.md