Commit My Pitches Screen.

Implemented accordian list view, in which there can only be one active
open list at a time. Allows you to add new recordings to a pitch list.
Plus icon on left hand side allows you to add headers (aka pitches).
Opening up a pitch list, the first option is [ Add New Recording ]. This
button could be the segway into the next screen.

Unfortunately did not get Edit (which most likely would have just
implemented Delete (both projects and recordings), unless you guys have
other ideas for it as well. Let me know.