Add dashboard controller tests.
Add groups controller tests.
Add links controller tests.

Also adds doc formatting to rspec output.

Minor change in the links controller to use links belonging to the
current group, not just any link in the model.
Add tests for colors controller.
Add tests for edit mode.
Change test to use include instead of ==.
Fix typos and tab errors in controller tests.
Remove stubs from color model specs.
Merge pull request #44 from msrose/feature/controller-testing

Feature/controller testing. Closes #36.
Create a fairly detailed README file.
Fix table formatting in raw README.
Remove task list from README.
Merge pull request #46 from msrose/feature/readme

Feature/readme. Closes #31.
Add a helper method for accessing the page title.
Dynamically assign title based on page. Closes #38.
Merge pull request #47 from msrose/feature/page-title

Feature/page title
Add order rank column to group and link.
Add order_rank to forms and seeds file.
Add ordering by order_rank to default scopes.
Add tests related to order rank.