different instructions for different versions of ubuntu
consolidated the instructions for ubuntu
minor corrections
Merge pull request #15 from pharpend/master

Change potentially system-wrecking pacman command in README.
Added JSON section
applicative and liftA2
Merge branch 'master' of github.com:bitemyapp/learnhaskell
added RankNTypes example
Merge pull request #12 from kissandra79/master

The instructions for ubuntu are different depending on the version
Added epic tel/gclaramunt thread
added link to dialogues
spelling error, thanks @mwotton
Adding some community guidelines
Merge pull request #16 from mdjnewman/master

Adding some community guidelines
Sub-header, community guidelines.
Added magma, free monoid, parallelism discussion
Added Guy Steele talk
Laziness, strictness, defaults
streamlined Ubuntu instructions
State monad <-> fold