WL#2911: Integrate NDB Kernel into MySQL Server

Integrate NDB Kernel into MySQL Server
1) Make sure it compiles (Already done in prototype by Jonas Oreland)
2) Make sure parts of it can be executed immediately by function call to
kernel (Prototype already done by Jonas Oreland)
3) Further optimise signal sending to avoid copying data and rather send
pointers through signals converted into copying if data needs to be sent
distributed.