Thorough haddock documentation & getting pads on hackage

[cronburg]

Since I mucked around a lot in the internals of this implementation of PADS in implementing a prototype of direct memory (pointer) parsing a while back, I'm planning on documenting a bunch of the internals of pads-haskell as I understood it. This is in particular a good stepping stone to getting this package on Hackage.

This is the command I've been using to build documentation presently:

stack haddock --force-dirty --haddock-internal --haddock-deps

I may not get around to this until towards the end of this month.