Fixed potential divide by zero error in IFS
Added comment documentation for a few uncommented push-argmap keys.
Merge branch 'fix-IFS-div-by-zero' into new-char-stack
Merge branch 'master' into new-char-stack
Added char stack, common instructions, and one char-specific instruction
Added a bunch of char instructions, as well as a few others.
Added lots of char and string stack instructions, as well as a few others.
Added exec_while, exec_do*while, and common "empty" instructions
Updated clj-random version
Removed superfluous comment
Fixed bug with printing empty list using print_exec and print_code
Version bump.