Use of $var in Python code

John Williams implemented support for using $var in Python code.  This
avoids the awkward "_no.var".  For example, you can now use:

	@if $OSTYPE == 'linux':

Instead of:

	@if _no.OSTYPE == 'linux':

A bit of explanation can be found in the tutorial, "6. Using Python" and
in the user manual, "21. Using Python".

I have checked in version 1.059 and the zip archive is available at
http://www.a-a-p.org/files/aap-latest.zip.

Comments are welcome.  Please watch out for Python code where a $ causes
trouble.

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                 "Monty Python and the Holy Grail" PYTHON (MONTY) PICTURES LTD

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