Integrate with iZipline NFC

This will need a method to produce "from Midnight" Playlists to be able to synchronise with iZipline

• Have a way of setting a playlist to be "from midnight" which means we need to have a UI, store it and expose this in the API as a setting

• If it is a from midnight playlist in the Player API we need to return video durations

• Restrict a playlist to only permit it to contain actually assets i.e. no MRSS, nested - we need to determine if we allow people to switch and design a workflow around this i.e do we remove the assets that are not supported in this mode

• Prevent validity and conditional playback being used

• Know which player types can support this feature

• Update web players to support this playback method - SSSP is done, although it is a little crude so can be improved