added windows8 support, and added tests
available list of platforms includes windows8
config.xml helper function is used, removed error merge of wp folder.
Merge branch 'cordova-3.1.x' of https://git-wip-us.apache.org/repos/asf/cordova-cli into cordova-3.1.x
updated to use 3.1.0
updated to use plugman 0.13.x