Added Travis CI support

Go to travis-ci.org to enable it on your fork!
Added Spring 3 as IoC container.

Also configured all beans and wired the mailqueue to the eventbus.
Replaced the maven assembly plugin with one-jar, as the assembly plugin
overwrote the spring meta files from each spring dependency, instead of
appending them.
Added first implementation of an irc client which echos new mails to channels.

Added the sirc irc library and implemented connection configuration and
a handler and support for commandline overwrites of the settings.
Also refactored some classes and put them into better packages.
Merge pull request #3 from pascaldevink/master

Added support for Travis CI