Log Message:
update to 1.4.1 and fix one bug:
  * system properties file was never used.

Changes in 1.4.1:
  * Fixed PAL sound issues.
  * Cleaned up the SDL event gathering loop.
  * Control/Alt can now be used for any event.
  * Updated stella.pro file to work with the latest Good2600 ROMset release
    (Thanks go to Voch for helping to maintain the stella.pro file).