It's size is now dynamic (defaulted to 1024)
Added MemoryPool::GetFreeBlocks()
Added MemoryPool::GetSize()
Tried to make it thread-safe
It supports dynamics allocations (in case where it can't allocate memory
from the pool for some reasons)
Former-commit-id: 1cc6cb2bc118556363a5c8ba1d18b3b1ce734862
Lynix