Adding signal to all cases of bounded queue.
New closure interface which hides libffi.
Increasing processor work queue size.
Removing private queue creation from processor.
Use release build of lfds.
Move signal to dequeue instead of every enqueue.
Fix access of free'd memory.
Fix executor constructor.

Allocated the wrong amount of memory and also forgot to set
a flag.
Include valgrind information for our stacks.
Use guaranteed enqueue in all places.
Remove unnecessary maybe de/allocations.