don't need [] on name when using an input
make sure we aren't saving empty arrays
nicer docs
 :) Thats not how you use push. Was this ever tested?

Whilst we're here we're also using the wrong variable for post_id!
Do we need to json.parse AND json_encode?
new example functions to test all this
Merge branch 'refs/heads/master' into fix-post-select-ajax-multi

Conflicts:
	example-functions.php
Merge pull request #90 from humanmade/fix-post-select-ajax-multi

Fix post_select multi select with AJAX