Rename the custom word STOP to BYE, which may be more common.
Implement 23 of the 46 Core Extension words.
Words added in the last commit allow for this RC4 cipher program to run.
Implement AGAIN
Implement PAD
Implement :NONAME (and #TIB ... should've been separate commits)
Implement MARKER
Add UNUSED
Implement PARSE
Turn all errors to warnings in testfile
Test PARSE
Implement C"
Implement CONVERT
Add [COMPILE].  Change magic numbers pushed on the control stack.
Add REFILL and SOURCE-ID.
Implement ?DO
Add COMPILE,.
Simplify the control flow stack a bit, change 'magic' numbers.
Add CASE...OF...ENDOF...ENDCASE, fix >R and R> to be non-immediate.
Fix compilation of runner.dtx