Include link to one-line haskell vim installer

It installs all necessary helpers like ghc-mod etc and configures vim.
Merge pull request #23 from begriffs/master

Include link to one-line haskell vim installer
Neutral GHCJS / Haste / PureScript
Comparison
mention hvr's travis.yml
Improve descriptoin of deb.haskell.org repo
Merge pull request #28 from nomeata/patch-1

Improve description of deb.haskell.org repo
list, fold, wording
Minor wording fix that had me confused

For me, at least, the current form first parsed as "The primary use of LYAH and RWH, in general, is (supplemental references if you aren't new to programming)".
Merge pull request #29 from benzrf/patch-1

Minor wording fix that had me confused
Add Gabe's desugaring article