Update mocha.js

Typo fix.
Fix compilers for mocha and latest coffee-script
Merge pull request #28 from xaka/patch-1

Fix compilers for mocha and latest coffee-script
Merge pull request #27 from benhutchins/patch-1

Update mocha.js
Release 0.2.1
Merge pull request #29 from mmoulton/develop

Release 0.2.1