Add ability to search a specified DJs playlist

[eric-gilbertson]

Add ability to search playlists for a specific DJ. Currently it is difficult to find spins by a particular DJ because the current unbounded search returns too much data. Use case includes a DJ trying to find a previously played band when only a tidbit of information known, e.g. band or a portion of the song title and/or trying to find the same from some other DJ.

Suggested Enhancements:
Add a 'My Playlists' option to the 'search type' dropdown on the homepage and display it when the user is logged in. Also add ' Playlists to the dropdown when searching from a DJ's information page.