Added new deliverable.
The sublime-workspace files seems to change itself around.
`ls | wc` working!!
Simplest REPL done.
Removed executing code in lexer, effectively turning it into a lib.
Merge branch 'master' into pipe
Multiple pipes working.
Turned `main` on.
Builtins framework set up.
Messy commit. Fixed lots of user input sanitization problems (esp. with
pipe), and created two builtins.
Basic job control set up.
Improved builtin lookup mechanism.