Bump ArangoDB for Travis-tests to 1.4.0-beta2
Adapted configuration parameters for 1.4.0-beta2.

Hmm... Travis Errored out with:
2013-10-20T08:53:01Z [1206] FATAL no value has been specified for --javascript.app-path.

Trying to set it explicitly
Merge pull request #153 from frankmayer/devel

Bump ArangoDB for Travis-tests to 1.4.0-beta2