removing refference to global docpad

Apparently DocPad removed this in one of their releases...
declairing chai dependency in package.json
normalizing ignored files and paths so that it works properly on windows
Merge branch 'master' of github.com:nfriedly/docpad-plugin-jshint into nfriedly-patch-1
Bumped version to v2.2.0 and updated JSHint
Merge branch 'nfriedly-patch-1' into develop
Merge branch 'develop'