Fixed a PHP Notice related to WordPress version 3.9 and $wpdb->prepare()
Added a third parameter of $form_id to most hooks and filters. Then, instead of just checking to see if $ninja_forms_loading is set, we check to make sure that the $loading class is the same as the form we are looking at. This is so that two forms can exist on the same page and function properly. Tested with extensions and not found to be causing any problems.
Merge branch 'develop' of https://github.com/wpninjas/ninja-forms into develop