Added ISimpleMemoryMethods (subset of IMemoryMethods with just alloc and free) and MemoryMethodsFromSimple<TSimple> which implements most of IMemoryMethods using just the methods from ISimpleMemoryMethods.
Added ISimpleMemoryMethods (subset of IMemoryMethods with just alloc and free) and MemoryMethodsFromSimple<TSimple> which implements most of IMemoryMethods using just the methods from ISimpleMemoryMethods.

dahall/vanara