Exit codes

When swiftDialog closes it will return an exit code which can be used to determine what, if any, action was taken

Exit Code	Cause
0	User clicked the default button (button 1)
2	User clicked Button 2
3	User clicked the Info button
5	exited via the command file `quit:` command
10	exited because the user used `cmd+q` (or cmd+quitkey)
20	quit because `--timer` reached 0
201	an image resource was not found
202	a file resource was not found
203	an invalid colour value was used