add net\stubbles\lang\typeFor()
add isKnown()
add net\stubbles\lang\reflect\MixedType
add support for return type void
remove unused import
add net\stubbles\lang\reflect\ReflectionParameter::getType()
Merge remote-tracking branch 'upstream/master'
update changelog
Merge pull request #70 from mikey179/master

work for 3.1.1