ENYO-2724 : the the attributs of phonegap parameters defined in "project.json" file are now automaticaly charged in the display of the Phonegap build UI.

This commit also contains some refactoring of the code.
Merge branch 'ENYO-2403' of github.com:enyojs/ares-project into ENYO-2403
ENYO-2724: clean some log instructions.
ENYO-2724: fix for an input display issue du to the CSS styling.
ENYO-2724: change in the color of the drawer header in the panel "Phonegap Build".
ENYO-2403: Put back "ENYO-2732: Add proxy parameter in package download call""

This reverts commit 1fda39e12fea34fe96ac8c5b7db6d5bb8fab1ae5.
Merge pull request #404 from enyojs/ENYO-2403

ENYO-2403: The UI "Phonegap Build" Charge the values of Phonegap build configuration parameters each time it shows up.