Consider merging Release Notes Application and Release Application

Right now we have 2 apps:

• Release Notes Application for managing release notes: http://extensions.xwiki.org/xwiki/bin/view/Extension/Release+Notes+Application/
• Release Application for managing release plans: http://extensions.xwiki.org/xwiki/bin/view/Extension/Release+Application

If I remember correctly I named the release plan application as "Release Application" because it has been my idea to add support for release notes in it (but I had forgotten and thus created the Release Notes application ).

So the idea would be to merge the new Release Notes app into the Release app.