Update CoreConnection.java and CoreInfo.java to work properly with the latest updates to the Quassel core.
This removes code to handle several messages from the core that were never used in Quassel itself and have been removed from the latest core. It also removes the core version checking, which is pointless because of the protocol version check.
Merge pull request #126 from mamarley/quasselgit

Update CoreConnection.java and CoreInfo.java to work properly with the latest updates to the Quassel core.