Enyo 2403

Enyo-2403:
A UI widgets are added in the pannel "Phonegap build" to let the user choose all the parameters for the file "config.xml" used  to build the native applications for serveral plateform (Android, IOS, Black Berry, ...).

In this pull request, the file config.xml isn't genereted yet from the "Phonegap build" pannel.

The UI should be improved to fit well in the "Project -> Edit" pop-up.

Tested on Chrome, Firefox & Internet Explorer
Couldn't be tested on Safari because there is an error in Phonegap acount authentification.

Enyo-DCO-1.1-Signed-off-by: Rafik Adiche mahmoud-rafik.adiche@hp.com