Minor tidy up
Merge pull request #19 from lloydwatkin/travis-ci

Add moar JDKs
Merge branch 'master' of github.com:lloydwatkin/buddycloud-server-java into rsm
Added getNodeSubscriptionListeners method to NodeStore
Merge branch 'rsm' of github.com:lloydwatkin/buddycloud-server-java into rsm
Only send one notification per external server
Merge branch 'master' of github.com:buddycloud/buddycloud-server-java
Merge branch 'master' of https://github.com/buddycloud/buddycloud-server-java