use load-grunt-tasks
Merge pull request #521 from robinboehm/load-grunt-tasks

use load-grunt-tasks
More color blind friendly CSS from @dleppik

Updating the passing and failing colors in HTML reporter to
help red/green color blind users using the colors suggested by @dleppik

Console reporter still likely needs similar changes but there's less
options there

[#463, #509, finishes #60613086]
Add in default rake task