create RWPool
  update bench_pool


storage/ndb/src/kernel/blocks/dbdict/Dbdict.cpp:
  move key descriptor
storage/ndb/src/kernel/vm/Makefile.am:
  Add RWPool
storage/ndb/src/kernel/vm/Pool.hpp:
  Fix release(i)
storage/ndb/src/kernel/vm/SimulatedBlock.cpp:
  Mave key descriptor
storage/ndb/src/kernel/vm/WOPool.hpp:
  Fix alignment
storage/ndb/src/kernel/vm/bench_pool.cpp:
  lots of updates to bench_pool
storage/ndb/src/kernel/vm/RWPool.cpp:
  New BitKeeper file ``storage/ndb/src/kernel/vm/RWPool.cpp''
storage/ndb/src/kernel/vm/RWPool.hpp:
  New BitKeeper file ``storage/ndb/src/kernel/vm/RWPool.hpp''