fix mpd_conn variable
fix imports
fix book property names
set book_id when starting a new book
fix set_progress method on book class
fix column order from db
move stop for new book command to player
fix bad lock
fix bad lock
fix playing known book after unknown
fix volume down, and book property name
fix problem with seek
add file sorter
oups, wrong syntax for sorted()
don't set book_id to None for unknown card
detect end of book
delete progress from db at end of book