small fix and improvement (dynHeadless):
small fix and improvement (dynHeadless):

    - use the correct path for the eval
    - basic support for printDepGraph

mattgoldspink/grunt-sencha-dependencies,mattgoldspink/grunt-sencha-dependencies,cjsmith/grunt-sencha-dependencies,pablix/grunt-sencha-dependencies,pablix/grunt-sencha-dependencies,mattgoldspink/grunt-sencha-dependencies,cjsmith/grunt-sencha-dependencies,cjsmith/grunt-sencha-dependencies,pablix/grunt-sencha-dependencies