gamma default for <= 100k. slimmed down pom (moved a lot to test scope).
playing around with MXBeans. not using IRCBot as a singleton anymore
(prone to bugs), same for Pinger. moved Pinger to own file since it it
growing a lot.
proper mocking of pinger in LocalConsoleTillerinobot (and concurrent
messages). Changed number of beatmaps searched for test recommendations
to 1000 since it is very inviting to use TestBackend for unit tests.