* Track last clicked element to determine form action
* Return true/false on hooked submit function to correctly process "Preview" clicks
* Use standard ACF error/messaging
* Clean up JavaScript/CSS handling of UI elements
* Define ACF_VF_PLUGIN_FILE constant
* Return a subset of field fields to improve performance
* Clean up array warnings

git-svn-id: https://plugins.svn.wordpress.org/validated-field-for-acf/trunk@904340 b8457f37-d9ea-0310-8a92-e5e31aec5664