Activate CPC for cps functions by annotating them with the appropriate attribute
Initial structure of coroutine-cpc implementation
Add debugging printfs
Update prototype a little more
Unify coroutine_fn annotations
Alter the annotations on a bunch of files that wouldn't compile before
Replace the definition of cpc_continuation_expand with a more appropriate one
Copy cpc_invoke_continuation from cpc_runtime.c
Actually invoke the continuation properly
Push the entry argument, not the function
Zero memory when allocating
Temporary commit of work in progress