Exit with exitCode:1 if a plugin could not be restored from config.xml
Exit with exitCode:1 if a plugin could not be restored from config.xml

 This closes #541

filmaj/cordova-lib,purplecabbage/cordova-lib,phonegap-build/cordova-lib,apache/cordova-lib,matrosov-nikita/cordova-lib,stevengill/cordova-lib,dpogue/cordova-lib,stevengill/cordova-lib,purplecabbage/cordova-lib,phonegap-build/cordova-lib,shazron/cordova-lib,shazron/cordova-lib,filmaj/cordova-lib,shazron/cordova-lib,filmaj/cordova-lib,shazron/cordova-lib,filmaj/cordova-lib,dpogue/cordova-lib,phonegap-build/cordova-lib,purplecabbage/cordova-lib,phonegap-build/cordova-lib,stevengill/cordova-lib,stevengill/cordova-lib,matrosov-nikita/cordova-lib,matrosov-nikita/cordova-lib,filmaj/cordova-lib,apache/cordova-lib,apache/cordova-lib,apache/cordova-lib,dpogue/cordova-lib,matrosov-nikita/cordova-lib,matrosov-nikita/cordova-lib,phonegap-build/cordova-lib,matrosov-nikita/cordova-lib,phonegap-build/cordova-lib,stevengill/cordova-lib,dpogue/cordova-lib,dpogue/cordova-lib,dpogue/cordova-lib,purplecabbage/cordova-lib,shazron/cordova-lib,purplecabbage/cordova-lib,shazron/cordova-lib,stevengill/cordova-lib,filmaj/cordova-lib,purplecabbage/cordova-lib,apache/cordova-lib