Update to use current version of qtserialport

1. qtserialport has been substantially updated since honeymon was last updated.  This pull request encompasses the changes required to support the current version at https://qt.gitorious.org/qt/qtserialport/

2. a couple of minor updates to slightly improve the mac experience - modifying .gitignore to exclude the macos application package and attempting to close the serial port when the application exits.