Clean up site docs to prepare for 1.0 release.
Remove an unnecesary word.
Fix up a few places where words were missing.

This makes the text sound better when I read it out loud.
Highlight “localhost” as code in the migration docs
Add a URL for Drupal
Fixes for @parkr comments.
Clarify config option docs for problem in #858.
Merge pull request #918 from mojombo/awesome-docs

Clean up site docs to prepare for 1.0 release.