language-tags validation
travis
add languages rest crud interface -> first draft
refs #98
Merge remote-tracking branch 'remotes/origin/languages_admin' into Languages

Conflicts:
	.travis.yml
fix test
refactor language tag validator according to remarks from @koenedaele
fix build error
Merge pull request #100 from OnroerendErfgoed/Languages

Languages
update tests
languages REST interface
refs #98
Merge pull request #101 from OnroerendErfgoed/languages_admin

Languages REST