Switched monads presentation from Tex to Reveal.
Setup first few slides.
Full java example implemented.
Fixed wording.
Null-is-bull
Started Haskell intro section.
Added maybe slide.
Finished Haskell intro.
Merge branch 'reveal-test'

* reveal-test:
  Finished Haskell intro.
  Added maybe slide.
  Started Haskell intro section.
  Null-is-bull
  Fixed wording.
  Full java example implemented.
  Setup first few slides.
  Switched monads presentation from Tex to Reveal.