Paige Reeves

Results 2 issues of Paige Reeves

The goal is to have an implementation of malloc/free based on [mimalloc](https://www.microsoft.com/en-us/research/uploads/prod/2019/06/mimalloc-tr-v1.pdf). **Free List Allocator** - Thread-local lists of owned 64kB blocks. Separated (possibly implicitly) into available, exhausted, and unswept...

C-feature
A-space
A-allocator

This pull request introduces an allocator based on Microsoft's mimalloc (https://www.microsoft.com/en-us/research/uploads/prod/2019/06/mimalloc-tr-v1.pdf) used in a MarkSweep GC. It is largely completed, but it needs some cleaning up and logical rearrangement.