Updated the Atari Falcon version

Hello,
Almost 12 years later, I updated the Atari Falcon version of Elansar with some improvements:

• Better error detection at startup (the previous version could tell that you didn't have enough memory where in fact you didn't have a VGA screen, now the correct error is shown properly)
• I added a larger video for intro and a new ending video (using cinepak)

Enjoy !