removed live editor from product

Instead added a bundle to the RCP feature that enables displaying the
features in the about dialog.
The live editor make more sense for debugging while developing, not as
part of the release.

Change-Id: I80a93d81eb96c198499294dc8af7d0684409ca44
Reviewed-on: http://gerrit.esdi-community.eu/3208
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>