Merge pull request #65 from TessMyers/develop

temp fix for DnD, refactors railroad directive
Added gulp task for testing

gulp test runs all tests once
gulp test:watch watches for changes and runs accordingly
Added  tree-to-input directive to html
Added karma deep and fixed path.
Merge pull request #64 from tgrrtt/develop

Added gulp task for testing
(fix) drag and drop actually works the way it's supposed to