https://github.com/Invulu/custom-customizer-postmeta
##Description
This is an experimental plugin to add custom post meta fields to the customizer. It requires the Customize Posts plugin by Weston Ruter.
Custom Post Meta info is pulled from the /meta-info/meta-info.json file, and added to the appropriate post type editor sections within the WordPress customizer.
It's only been tested with 'text', 'checkbox', 'select' and 'post_editor' inputs so far.
See the meta-info.json file for examples of how to add postmeta controls, and edit it to add the controls to your site.