used jsdom-nogyp instead of jsdom, the latter is hard to build for Windows
workaround for symbolic links not working on Windows, had to read file content by converting symbolink to real path first
Simplify the logic of findCordovaPath.

Since xface.js and plugins are all copied to
<Application_Home>/Documents/xface3/js_core, there is no need to
process xface_player any more.