CORE: add configuration for media browser

## Ready State: No

This implements a form (leveraged from standford_mediaconfig) , but the selections are not affecting the browser tab display yet.

This pull request is related to the following Git  Issues: 

https://github.com/imagex/imagex_media/issues/4

## Requirements & Dependencies

* media
* media browser

## Deployment Instructions

* Merge code.

## Usage/Test Instructions

* Ensure configuration choices for WYSIWYG configuration are available from Media Browser Settings., and that the configuration is reflected when selecting media.
* Visually view the changes on the homepage.