Providing substitue for _aligned_malloc and _aligned_free

[mjsabby]

Is there a reason why in the test module and the new user module that the allocation functions are not settable by the library user?

For example, it's possible a user may want to use the stack for providing memory in super high performance scenarios.

Sorry this is more of a discussion but I didn't see the discussion tab open.

[mjsabby]

I create #38 for this.

[NielsFerguson]

Thanks for looking at the code and thinking about how to improve it.

See my comment on the pull request as to why I don't see how this would be an improvement.