Use the generics for memory insted of infererence.
Also, remove read-during-write bypass by tweaking index comparisons.

We cannot access variables outside the process, which we will need
to be able to do in the next patch.

The optimizer should be able to remove all the control registers
as they are unchanging, so nothing is lost.

Updated uses of the wishbone_pkg to use Tom's naming conventions.
Added Manifests for the new files.