Alphabetize CSS properties

[ewinslow]

This is the easiest way to remember how they should be ordered. We should add this to the css best practices and then just fix issues as we come across them. This also makes other rules moot, like grouping subproperties, since they are naturally grouped by alphabetization.

[ewinslow]

Wondering if it's worthwhile to make this a standard for php arrays too (make sure the keys are alphabetized).

array(
  'href' => '...',
  'name' => '...',
  'text' => '...',
);

I have no interest in making sweeping changes to old code in either of these cases, just something to suggest when we're accepting pull requests.