Add LMS plugin stub to allow seamless integration of the new skin.

[michaelherger]

The plugin would register the font files and the manifest file within LMS' web server. It additionally adds a custom-types.conf, registering the mime types.

In order for the skin to be picked up, the resulting index.html file etc. need to go to the HTML/ultralight sub-folder.

[michaelherger]

This plugin doesn't have any kind of integration with your build process yet. What you'll need is

• move the skin files to the HTML/ultralight sub-folder
• zip the UltralightSkin folder
• create a repository file somewhere so users can download the plugin automatically

One more plus for this approach: as the plugin is registering the fonts as "raw downloads", you can leave those files where they are. No need to move them to another sub-folder to be treated as static files. (you can still do this, if you like, but then you'd have to remove that code from the plugin)