Mostly working version of generic EG app.

Mostly working version of generic EG app.

Main points are:
* eg_app main activity is ChooseLibraryActivity, whereas cwmars_app main
  activity is SplashActivity (need a better name for that).
* there is a little bit of weirdness when you create an account using
  eg_app and then restart and then hit Back.
* there is a bug when you add a 2nd account using the eg_app
* in general the app prefs are stored in the new class AppPrefs, though
  there are still some references to GlobalConfigs.httpAddress