xml version 0.6

some changes to the xml - see commit messages!
bernhard also fixed some warnings.
a sample program with all bricks: https://gist.github.com/kaufi/8a966012f19d865faeb4
(the "tags" tag is missing) - updated header:
https://gist.github.com/kaufi/80e924971beee8b25fcc

successful testrun: http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-test/578/