Beta 9

- default GUI and main window position is centered, not top/left corner
- optional ini-file registry replacement.
* -ini in command line: use
* winuae.ini used if it is in same directory as winuae.exe
* file extension must be .ini or it will be ignored
* file will be silently deleted and re-created if
- it is read-only but not delete-protected
- if warning messages in ini-file are modified or deleted
- if it is not compatible with new version
* message will be added to both logs if registry replacement is enabled. Bug reports without also testing in non-ini mode will be ignored.

* Pointless Windows feature "discussions" won´t be allowed.