Apply htmlpurifier profile from filtered to full.

Also adds the video and source elements to enable html5 video
element which works in conjunction with mediaelement.js module.
Remove site-specific legacy function name.
Remove mediaembed from advanced profile.

Also fixes filter ordering in full_html text format.
Remove mediaembed from simple profile.
Merge pull request #35 from kevinchampion/video_embed_config

Feature: Profile and configuration changes to enable video embed.