refactor(library): change library name to avoid conflicting with
existing

 * a backbone-injector exists
 * this library being based on Backbone.Wreqr its name should reflect it.
feat(attachment): change injector attachment

BREAKING CHANGE:
injector is now attached to Wreqr instead of Backbone
test(test): update tests to support new attachment
chore(grunt): fix grunt tasks

* add missing deps in package.json + clean task
* update umd as library deps is now only on Wreqr
bump version 0.2.0