Merge tag 'v0.0.3' into develop

Added proper styles and stuff
Correctly speccing User→Estimation
Specced EstimationItems
Specced estimations loading in the welcome#index
Renders estimations
Correctly renders estimation details
Validations for EstimationItem
Completed acceptance test
Merge branch 'feature/models_for_estimation' into develop
Added poltergeist driver to capybara
Accomodated RSpec for use with javascript tests (database_cleaner)
Items are added with AJAX
Merge branch 'feature/ajaxy_items_add' into develop
Added ability to create new estimations
Merge branch 'release/v0.1.0'