These parsers are unused and generating them leads to changes in the
source of ghc-parser, which causes more rebuilds than necessary.

GHC Bug #8639 was fixed four years ago.

This stops nbconvert from complaining.

This leads to the wrong binary being used as per #733.

* Bump resolvers to lts-9.0

* Import HLint3 instead of HLint2

Move 'Nix' under 'Running'

Since we are assuming `stack`, this makes IHaskell usage more convenient.

libmagic-dev
libblas-dev
liblapack-dev

Add libmagic to mac install instructions

This was the only change I had to make to get it working on OS X Yosemite.