Finally keeps Release.revision date simple in footer as suggested by Scott on Dev ML
No needs to over-engineering things there. A bit more smart than before though
This reverts r1625006 and r1624886 and adds CommonBuiltOn and better svninfo and gitinfo targets
I just regret that I lose the formatting effort I did in footer.ftl files, but I have not the guts to do it again.

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1625907 13f79535-47bb-0310-9956-ffa450edef68