Cleanup of Gruntfile Server Task and Bower.json additions

Modify uglify task for server/dev, no longer uglifying page files.  Ignore debugger statements for jshint in server/dev task. No longer uglifying Modernizr and Yepnope because minified versions already included, instead processing these files in concat task. Build/preview tasks will need to be modified to take into account server task changes.  Used the bower install --save flag to add yepnope and fastclick as these were not included in the bower.json.