Remove globals from .gruntjshintrc
Fix .gruntjshintrc whitespace

Also moves the environment option down to the bottom to make it stand out.
Fix commas in .gruntjshintrc
Fix .jshintrc whitespace

Also moves environment options down to the bottom to make them stand out.
Update .gruntjshintrc
Switch to checking for single quotes in JS

Matches and encourages WP coding standards.
Merge pull request #8 from GaryJones/patch-1

Fix up JSHint configs