KORE milestone 1

**please review**

 - unit-tested convertors from KORE to KIL and back
 - significant changes and simplifications to KORE data structures. They are smaller and more powerful now

@grosu are you happy with this as a default klabel strategy for cells? I would have expected "'<cellName>_</cellName>", not "cellName", but I admit I have no real strong preference here.