Fixed card removal detection
Fixed card removal detection

Also switched from using seek command to select command with the reader.
Select returns a result immediately, rather than seek which first
returns an "in progress" error then later returns the card (as far as I
can tell).

sreidy/roboticsclub.org,CMU-Robotics-Club/roboticsclub.org,sreidy/roboticsclub.org,CMU-Robotics-Club/roboticsclub.org,CMU-Robotics-Club/roboticsclub.org,sreidy/roboticsclub.org