add option to emulate a 4 way joystick and ignore diagonal states on icade

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Run pacman.  It was written for a 4 way joystick and gets confused by 
diagonal directions.  See below
2.
3.

What is the expected output? What do you see instead?
It is not reacting properly like the real arcade

What version of the product are you using? On what operating system?
1.7.1 ipad2 with icade

Please provide any additional information below.

For details of the problem, go to wikipedia, look up "arcade contoller", and 
read the section called "restrictor gates".  This problem is really bad on 
icade since it uses a square rather than a diamond shaped restrictor.  It would 
be good to be able to emulate either a full 8 way stick (default), a 4 way up 
down left right, or a 4 way diagonal.  Can this option be tied to each game?

Original issue reported on code.google.com by mike43...@gmail.com on 28 Jul 2011 at 4:08

[GoogleCodeExporter]

I was thinking on this time ago. Now that I was reworking iMame input adding 
analog touch control could be the time to add the feature. 

Original comment by seleuco....@gmail.com on 28 Jul 2011 at 6:55

[GoogleCodeExporter]

done

Original comment by seleuco....@gmail.com on 27 Sep 2011 at 5:59

• Changed state: Fixed