remove loads of unused code...
Revert "remove loads of unused code..."

This reverts commit 72715308a9b695fec588a5562a7c0ca9f3fb1736.
move field anywhere code to separate file and document.
Merge branch 'refs/heads/master' into remove-old-code

Conflicts:
	custom-meta-boxes.php
Merge pull request #92 from humanmade/remove-old-code

Remove old code