Add playlist support

Move register post types and taxonomy to seperate class
Added new filter fp5_video_config
Add flush_rewrite_rules
Improve method of adding columns - allow playlist column
Imrpved way of loading the video markup
Add hidden metadata field for video duration
Reverse order of Flowplayer Drive videos
Add ability to add playlist shortcode easily
Update loading and initalizing the classes
Hide parent category & add partial WP4.0b support
Delete meta data when deleting taxonomy

Improve text strings
Reduce PHP notices