allow passing unmodified json array as argument (i.e. allow brackets).  Add allowed action `playlist` to get the jPlayerPlaylist-formatted JSON.
Added function to get the jPlayerPlaylist-formatted JSON for a list of shiurim.
finished player JS for playlists.

TODO: figure out why playlists sometimes double-load (causing list to open,close,open and autoplay not to work).
Removed old JS code from Player viewmodel and added function for playlist names
Include the ShiurID in the JSON returned for the player (so we can match on it if we need to).