Updating calls to plugman after a refactoring there
Removed executable attribute from cordova.js.
Fixed up + updated support for windows phone
updated wp7 + wp8 to 2.8.x branch
removed cordova-<ver>.js from wp spec tests
updating to consume plugman 0.7.8
no longer need to call plugman.remove, this is handled by uninstall.
cordova prepare now calls into plugman to ensure existing plugins have their config file changes propagated.
update plugman dependency
updating version to 2.8.0rc1