overlapping labels test now case insensitive
iso 639 language checking now against java.util.Locale
Merge branch 'master' of https://github.com/cmader/qSKOS
switched language tag language checks to java.util.Locale
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/at/ac/univie/mminf/qskos4j/issues/LanguageTagChecker.java
language tag performance improvement
Merge branch 'master' into devel
Merge branch 'master' of https://github.com/cmader/qSKOS

Conflicts:
	src/main/java/at/ac/univie/mminf/qskos4j/issues/LanguageTagChecker.java
java 1.7 required
detection of valueless associative relations with between same concepts but different parents
Merge remote-tracking branch 'origin/master'
fixed faulty hashcode implementation
added isemantics paper
minor changes
fixed rendering issue
fixed rendering issue
Merge branch 'master' of github.com:cmader/qSKOS
Merge branch 'master' of github.com:cmader/qSKOS
Merge branch 'master' of github.com:cmader/qSKOS
Merge branch 'master' of github.com:cmader/qSKOS