Updated Program to have SQLite Configuration done through Connection
Strings.
Added auto migration for the database, if we get an exception, we create
the database instead (As it doesn't exist.)
Updated Migrations to handle change of Int to Long (SQLite still uses
integer field, but better safe if using something other then SQLite)
Changed Primary Key for Video from VideoId to PlaylistItemId.
Removed videoId as Key, and use playlistItemId as Key, as this will be
unique to each playlist, and will not conflict with videos being on more
then one playlist.
