feedback requested for math/gap port reorganization

[David Bremner]

I wanted to upgrade the port math/gap port. Due to packaging changes
by the authors, it no longer seems as nice to build all of the
gap packages (extensions to gap) at once; for one thing, the giant
tarball now has the date in its name.  One thing led to another, and I
am currently at the following

port math/gap
	just installs the core into 
		${PREFIX}/lib/gap/${PORTVERSION}

port math/gap-package
	a "master port" for gap packages. I had to reassign DESCR and
	MD5_FILE to come out of the slave ports directory. I am not sure what
	chaos will ensue.

port math/gap-grape
port math/gap-ace
	two (of possible 10? 20?) slave ports. Simple 6 line Makefiles.
	PLIST is created on the fly by the master port.  Note that
	these set PORTNAME, so they are not really slave ports like 
	xdvi-300dpi

you can have a look at the whole business in 

http://www.cs.unb.ca/~bremner/gap-ports.tgz

Assuming the other subpackages go as smoothly, I should be able to
knock of the other slave ports to install the standard gap packages,
but I won't bother if there is something irreparably braindamaged with
the whole idea.