replace magnolia specific binary metadata NAME_properties with nt:resource

reasons:
1. Jackrabbit binary indexers only support nt:resource node indexing
2. defined by jsr170 and its much cleaner

I would have to touch all taglibs and core, after this we need one time content convertor because it wont be possible
to support old binary content structure any more.
since these are basic structure changes you might notice some instability for sometime

keep you posted