Create a custom allocator class #55

Description

One method for tracking memory allocations in Siege is through the use of custom memory allocators. One of the most common types of memory allocators is the PoolAllocator - which maintains a pool of memory which can be accessed by various elements in the application. A most basic form of this would be a class which stores a void pointer of raw data and tracks available allocations via a list of 'Partitions'. When memory is needed, we simply ask the allocator for a chunk of memory which we then use for the data that we wish to use.