Setup rubocop
Whitespace rules
Naming
Ruby 1.9 hash syntax
Merge pull request #1534 from alphagov/hash-syntax

Hash syntax

Use Ruby 1.9 syntax
Merge pull request #1533 from alphagov/naming

Variable, method and class naming
Merge pull request #1531 from alphagov/rubocop

Rubocop setup, fix whitespace issues