JSCodeHinting - Find requirejs modules even when project root doesn't match the requirejs root.

Looks for any files that end with the name of the module we're looking for.  Does not do any tie breaking yet, but this gets the requirejs support working when you open the 'brackets' dir for instance, instead of the 'brackets/src' dir.
Merge pull request #3553 from eztierney/requirejs-searching

JSCodeHinting - Find requirejs modules even when project root doesn't match requirejs root