Use Getglue v3 API

Using new getglue-java library.

Still to do:
- [x] Check for expired access tokens and renew with refresh token, clear tokens upon auth failure (check Retrofit errors for HTTP response code 401 Unauthorized according to http://developer.getglue.com)
- [x] Fix issues where shows do not have a GetGlue id, yet and auto-search will not return results.