rename CCArray.join to CCArray.addRange, add CCObject.ref which is lua object reference id
oMemoryPool allocate and free memory 4 times faster than the new and delete keywords in vs2013 sp2 release mode. And reduces memory fragments.
Add oMemory.shrink() to collect unused allocated memory space.
add USE_MEMORY_POOL() to get certain classes use memory pool.
add oCache.Pool:collect() to free unused pool space from all memory pools.
add oCache.Pool.size to get all pools` total size.