Removes unautop and autop methods: use embed shortcodes for oembed. Remove tinymce editor if using MD. Adds public wrapper functions

git-svn-id: http://plugins.svn.wordpress.org/wp-markdown/trunk@633701 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge branch 'master' of github.com:stephenharris/WP-MarkDown
Update readmes
Refactor markdown styles
Fixes bug with shortcodes with underscores.
Add support for 'more' tag on admin pages.
Merge branch 'master' of github.com:stephenharris/WP-MarkDown
Correct ID check. Ref #19
Support iframes. Closes #22.
Buffer ignoring '0'. Fixes #20.