uncommented tests with behavoiur depending on an Xtext-version
make dependency to JvmModelINferrerRegistry optional since it's gone in Xtext 2.7.0
improve error reporting in case of exceptions
added target platforms for Xtext 2.6.2 and Xtext nightly
fixed #131: potential NPE
support classes with protected/private constructors for MetaAnnotations
Merge pull request #3 from meysholdt/master

latest changes from meysholdt:master