[Bug-apl] MacAplAlt.keylayout & updated Installation Guide

[Peter Teeson]

I have a Mac keyboard layout available as well as an updated Installation Guide.
May I suggest that a new folder be created in /support-files named OS 
X-keyboard?

The Guide provides manual instructions on how to install it - a simple drag and 
drop to either /Library/Keyboard Layouts 
or preferably ~/Library/Keyboard Layouts.

I suppose it could be done automatically with make files but I have no 
expertise in this area.

The only thing I question is the duplication of the ⍙ glyph in Alt+Shift+h and 
Alt+Shit+b.
This is to follow what ]keyb displays. But I am curious why it is duplicated.
IMO the Alt+Shit+h is the proper place since Alt+h is ∆.

If you agree and want the Alt+Shift+b glyph removed I will do so on the Mac 
layout.

Then I can forward these two items to you for inclusion or update to 1.4 at the 
next minor revision.

respect….

Peter