Modifying files to work with jam.js (Partially fixes https://github.com/SlexAxton/require-handlebars-plugin/issues/79 although there's no way to configure it for jam compile at the moment - see https://github.com/caolan/jam/issues/127 ). This commit keeps the dependencies included in the package, although we could update it to use jam-provided coppies of underscore and json2 (and possibly handlebars)
adding jam dependency on handlebars so that it's avaliable for modules to use. At this point, jam can compile with this plugin as long as you're using default hbs settings
Merge pull request #86 from nfriedly/master

Slight modifications for jam.js support (partially fixes #79)