Added keepalive action.
Changes for test.
Added find and click action, and some type aliases.
ActionCommons.inAllFrames now returns a stream.
Keepalive now actually works.
Removed some printlines.
Added some overloads to keepalive method.
Renamed keepalive action to startKeepalive.
Renamed KeepaliveMsg to KeepaliveData.
Added stop keepalive action.