[aerogear-dev] [android] Removing AGAuthenticationModule

AGAuthenticationModule was originally made to login/logout/register with the AeroGear controller. Since controller is dead in a ditch somewhere, for AGDroid 2.0 I'm proposing we remove it from the platform. This will leave HttpBasicAuthenticationModule and HttpDigestAuthenticationModule. However I know this also exists for iOS and Javascript so I'm putting this post up for discussion. wdyt?