Merge pull request #42 from saily/master

Small documenation update
Instead of check for Dexterity, check if p.multilingualbehavior is installed. If it's installed, then Dexterity is installed too. This fix issue #40.
Merge branch 'master' of github.com:plone/plone.app.multilingual
Refined detection of LinguaPlone in the setup.
No PIL needed at all in Travis or anywhere. Pillow is installed in the buildout.
Shared correct name
Since the 2 new indexes are already added here, we might as well also add the catalog metadata. Also,
we make sure that if we need to reindex content, the catalog metadata gets updated too
Fix travis
This solves bug #44 - Old code
Update travis icon to show master branch
Merge pull request #45 from pysailor/master

Add catalog metadata, make sure it gets updated
Extend travis integration to test against Plone 4.2+4.3

Include following dependencies into tests:
  - ``plone.multilingual``
  - ``plone.multilingualbehavior``
  - ``archetypes.multilingual``