CB-5183 WP7/8 lib path is not correctly resolved by CLI (additional changes)
fix conflict with removed head code
tests were failing attempting to match lib/dir and lib\\dir on windows
CB-5307: Remove references to Callback and Incubator
CB-5248 Fix cordova create directory_name com.example.app AppName extra_arg

Follow up to CB-4748
* Treat string as fourth argument to `cordova create` as JSON
* Properly document arguments to `cordova create` in `cordova help`