Increased installation timeout for my slower machine
change beta warning handling

The beta warning must be shown on betas and it must not be shown in RCs.
So that fact needs to be made explicit via $BETA env var.
die if beta warning appears in non-beta
fix promo installation
add missing ocr test data
Made betawarning handling independend from env BETA
Fixed checklog; handle pngs and fixed undef warnings;
allow easy abort of timeout
set resolution to 1024
don't scale screenshots
remove useless get_ocr call
display remaining timeout
Change the matching method from COEFF to CORR, producing higher matching normalized values.
handling of scaled images
save as existing name
print notification when called from checkneedle
change color to cyan
rewrite waitstillimage and use it in sendautokeys every 5 key presses

Otherwise the bootloader menu may take too long
update gnome live needles
reduce the sleep time for keys a bit - but make it slower in bootloader test