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Merge branch 'master' of https://github.com/ese-unibe-ch/ese2013-team6
Merge branch 'master' of https://github.com/ese-unibe-ch/ese2013-team6
added create invitation dialog
Merge branch 'master' of https://github.com/ese-unibe-ch/ese2013-team6
Merge pull request #29 from dvicini/master

Invitation Creation Fragment added - needs to be created by some button !