Merge pull request #75 from Quintasan/patch-1

Update install.md

install.md

@@ -34,13 +34,13 @@ $ sudo apt-get install python-software-properties # v12.04 and below
 $ sudo apt-get install software-properties-common # v12.10 and above
 $ sudo add-apt-repository -y ppa:hvr/ghc
 $ sudo apt-get update
-$ sudo apt-get install cabal-install-1.20 ghc-7.8.4 happy-1.19.4 alex-3.1.3
+$ sudo apt-get install cabal-install-1.22 ghc-7.8.4 happy-1.19.5 alex-3.1.4
 ```
 
 Then add the following to your `$PATH` (bash\_profile, zshrc, bashrc, etc):
 
 ```
-~/.cabal/bin:/opt/cabal/1.20/bin:/opt/ghc/7.8.4/bin:/opt/happy/1.19.4/bin:/opt/alex/3.1.3/bin
+~/.cabal/bin:/opt/cabal/1.22/bin:/opt/ghc/7.8.4/bin:/opt/happy/1.19.5/bin:/opt/alex/3.1.4/bin
 ```
 
 *Optional:* You could also add `.cabal-sandbox/bin` to your path. Code that you