Addeded the use of remote server as an option.

I don't know if you will find this interesting, but here is a little mod to check against your own server. If you are using a _semi standard_ enterprise distribution system, the resulting _plist_ gives you the oportunity to check the version of the ipa residing in your server.

I introduced __setServerURL__ and modified the behaviour of __setAppID__ to check if there is a _serverURL_, if there is, _setAppID_ will check the server for a _serverURL/appID.plist_ and work from there.