Breakpoints

[TryTwo]

I think there should be an add/remove code breakpoints like there is for memchecks.

Also, it would be nice to specify if any breakpoint should pause on break. For memory breakpoints, specifying read and/or write would also be good.

I could try to add this. Would memory and code breakpoints both go into the same API file? Also not sure the best way to handle the extra args.