chore(docs): adds ngdocs support

this commit introduces the support for ngdocs to generate
some fancy documentation based on our source code. :)

ngdocs is used by the angular core itself and is also used
in other known projects such as angular-scrolly or angular-translate.

you can now run grunt ngdocs which will generate a site folder
for you. once this is generated you just have to start a simple
http server there to see the result. :)
Merge branch 'master' into ngodcs-support
Merge branches 'master' and 'ngodcs-support' of github.com:angular-leap/angular-leap

Conflicts:
	Gruntfile.js
	src/module.js