Bump 'rspec-rails' to '3.0.2'

This is to keep current while there aren't many specs in the project.
Merge pull request #73 from alphagov/bump-rspec-rails

Bump 'rspec-rails' to '3.0.2'
Add 'rspec-rails' to development gem group

This means that specs are run when `rake` is invoked.
Add app-specific rspec configuration
Port browsing-a-local-manual to rspec
Port 'view-a-manuals-updates' to rspec
Remove cucumber from project
Introduce domain layer for specs
Merge pull request #74 from alphagov/replace-cucumber-with-rspec-features

Replace 'cucumber' with 'rspec' features
Remove unused SCSS

This breaks the app when rails is upgraded, because `icon-information-transparent.png`
isn't present.
Bump rails to 4.0.9

This picks up the latest 4.0 security fixes.
Merge pull request #78 from alphagov/bump-rails-to-4.0.9

Bump rails to 4.0.9
Prettify EIM00500

This is in preparation to making a small fix to the content.
Expand manual & section viewing specs
Expand manual change note specs
Merge pull request #76 from alphagov/beef-up-spec-coverage

Beef up spec coverage
Remove the word 'manual'
Merge pull request #80 from alphagov/fix-copy

Fix copy
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