x instruction, and fix POP-VECTOR
I don't know how mycology didn't point out that vector popping was
broken earlier
Refactor r instruction to make use of VECTOR-TIMES-INT
Add ACTUAL-WIDTH and ACTUAL-HEIGHT slots to F-SPACE
These slots will be used as the actual bounds of the space, rather than
the size of the array, as the array is usually much larger to allow for
easy resizing of funge-space.
Use ACTUAL-WIDTH and ACTUAL-HEIGHT as size of funge-space
That was much less work than I anticipated
{ function
Doesn't handle storage offset yet