Merge pull request #30 from pharpend/master

Update the Gentoo install instructions
Fixed broken dropbox link to parametricity slides.
Fixed parametricity link again
Use more portable shebang

Down with absolute paths!
Slight corrections in Haddock section
Whitespace only
Merge pull request #32 from Fuuzetsu/slightlypedantic

Minor changes only
New Windows install instructions!
Added links to Chris Done's HIndent.

HIndent (https://github.com/chrisdone/hindent/) is a wonderful Haskell
pretty-printer. It takes the tedium out of doing indentation in Haskell. Highly
recommend. It includes a vim extension (or whatever it's called) and an Emacs
minor mode.

It is not included in any of the links in the README. I opened an issue on the
Emacs Haskell
tutorial (https://github.com/serras/emacs-haskell-tutorial/issues/20), but this
can serve as a temporary patch for the time being.