moved methods from Document, Asset and Object_Abstract to Element_Abstract + removed o_ getters / setters out of Object_Abstract and Object_Concrete getO_XYZ() setO_XYZ()

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3799 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
build auto version (2932) ...

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@3800 1f8fe7d8-47f0-464c-8d0a-336f4953ab05