Don't encourage use of Roots Rewrites plugin

Instead, use Bedrock.
Fixes #962 - Not used anymore
Use get_feed_link for RSS URL
Update Grunt to 0.4.2
Merge pull request #963 from patrickocoffeyo/master

Update Grunt to 0.4.2
Fix permissions
Remove widget-inner

No longer needed with box-sizing: border-box
Merge upstream