WL#1501: Colocate MySQL server and DB -node

Goals:
* Improve latency

Embedded NDB that can be started as a thread in side of MySQL Server to allow 
for easy testing and evaluation of NDB.
  - libNDB.a, exports function to be run by ndb-thread.
  - Uses InMemory transporter.

An alternative method is to start an NDB process from the MySQL server and
use a shared memory transporter. Performance of the two solutions should
be roughly equal.

 Pros:
- Less work
- No problem with NDB crash model to integrate into MySQL server
- No problems with finding out where signals are thrown from

Cons:
Processes can be manipulated by users.
Need to handle semaphore problems if NDB process dies while holding
common semaphore.