New version of the multi-system emulator for PC.

Changelog:

. "Filter audio" option (AmiArcadia only).
. Support for analog joysticks on host (AmiArcadia).
. New ARexx commands: ACTIVATE, CMDSHELL, DEACTIVATE, LOCKGUI, MOVEWINDOW, PAUSE, UNLOCKGUI, UNPAUSE (AmiArcadia only).
. New CLI arguments: PORTNAME, STARTUP (AmiArcadia only).
. "View|ROM as imagery" command.
. Miscellaneous improvements and bug fixes.