WIP: Reader monad
wat
Seriously fuck off, this can't actually be correct

That was just unreal. Did I consciously come up with this or was this pure luck?
Well, I'm only half-way there, obviously, but wow. WOW!
Remove obsolete imports
Reader Monads are awesome

Now we're talking
Merge branch 'reader-monad'

Not quite there yet. I'd still like to run the Reader in runTW', but
this is a good first start.