PiFace CAD IC - Set button No. 3

Button No. 3 has been set with the reverse function.
Added 27Mhz JSBR Mustang Model

I haven't tested this control spec as I don't own the 27Mhz version -
however; it should work. Better to be prepared.
PiFace CAD IC - Fixed Tab issue.

It' odd how everything looks perfect on my system when I open the script
in Notepad++, but on GitHub - it's all over the place. Perhaps just a
issue with the encoding GitHub uses. Haven't tested this build yet.
Merge pull request #9 from lavanoid/master

Update PiCAD Interactive Control and add another control spec.