various fixes, remaining features and cleanup
logs, contact lists and some minor stuff
catch SQL exceptions
Merge branch 'master' of github.com:sepm-depm/sepm-group into server-fixes

Conflicts:
	server/InterServerImpl.cpp
	server/SessionImpl.cpp
make sure chat exists for sendMessage
Merge pull request #25 from sepm-depm/server-fixes

Schaut gut aus