Optimization: Support for the 2 additional repos / Refactoring / Stabilization of features 

 Added support for the two additional code repositories:
 - ezpublish-kernel (fka ezp-next)
 - ezpublish-community (fka ezpublish5)
by adding-in:
 - local repatriation of the additional repositories,
 - consolidated changelog generation support,
 - consolidated (and slightly fixed) HTML/eZXMLText changelog
   generation
Renamed repositories (ref
http://share.ez.no/blogs/andre-r/upcoming-ez-publish-git-github-changes)