Move host actions to action bar (#142)

Updated to the latest version of RoboGuice, removed some custom modules because I couldn't figure out how they work with the new version.. 
Added an action bar to the host information screen and moved all actions there.

This should be tested on Android 2.3, I don't have a device for that! 
In general, it's better to put the markup outside the string resource, IMO. Makes translation easier; translator should not have to deal with markup.