Merge tag 'v0.3.0' into development

0.3.0
Basic tabs support via form definition

Works just like a fieldset, so it has nothing to do with arrays.
Needs documentation, test and some styling perhaps. Work in progress.
Support for help form type

As in jsonform.
Lacks test and documentation. Needs ngSanitize included to work.
Documentation and tests for help type
Tests and example for tabs
Documentation for tags
Version bump and CHANGELOG
Merge branch 'release/v0.4.0'
Merge branch 'master' into gh-pages