extended pom.xml for unit tests
Merge branch 'develop' of github.com:Metalcon/likeButtonServer into develop
started with api tests and suggested some extensions of the API
Moved Initializations into LikeService
Merged LikeService
Added IOHelper
Bugfix: use String.equals instead of ==
Bugfix: Vote.getByFlag did not return NEUTRAL in case of voteFlag==3