Added wercker.yml
Make sure VM has gulp installed.
Running fulltest on wercker.
Fixed description in wercker.yml
Merge branch 'develop' into feature/wercker-integration
Test Deployment Method.
Fixed bug in NodeFactory function

The parseRdfTerm erroneously used only the first character of a blank
node label as label string.
Added tests for NodeFactory
just removed a comma in NodeUtils.js
added tests for NodeUtils
set the allowed max depth of nested blocks to 4

This was needed since I used 'for ... in' loops with hasOwnProperty
checks which would be rejected otherwise.
Some fixes and comments on PrefixMappingImpl

- rewrote forEach loops to for-in loops since forEach didn't work for
  simple prefix maps
- fixed the shortForm method
- added some TODO comments
- minor changes (removed comma, ...)
added tests for PrefixMappingImpl
Implemented bower tagging
Removed tests for now.
Finishing touches for wercker integration.
Merge pull request #15 from leipert/feature/wercker-integration

wercker integration (Close #9)
Deactivated tests on wercker because we have travis ci.
Wercker will create docs and push them to the github pages branch.
Wercker will deploy to GeoKnow/Jassa-Bower.
Merge branch 'develop' of github.com:GeoKnow/Jassa-Core into develop
Merge branch 'feature-sponate' into develop