Enabling array functionality in exclusion configuration

This will allow a user to specify a singular regex or string
or an array of regexes, strings, or any combination of
the two.
Merge pull request #4 from jnwng/jon-add-exclusion-list

Enabling array functionality in exclusion configuration
Move mocha to devDependencies
Code style
Compile
Add coffee-script devDependency to fix `npm test`
Release 0.2.0.
Preserve alternate file extension. Resolves #6
Compile
Release 0.2.1.