maxima-5.15.0 and related stuff in Gentoo

Hello *,

I was at a conference, and could not do the ebuilds earlier.
Here we go:

1. maxima-5.15.0.ebuild is in the science overlay.

If you want to emerge it with USE=gcl, please, use gcl from the lisp 
overlay:

http://repo.or.cz/w/gentoo-lisp-overlay.git

because gcl in the portage tree is broken.

It now includes imaxima; if you emerged it before, you will have to 
unmerge it. It depends on dev-tex/mh (which includes the newest breqn). 
dev-tex/mh has the only keyword ~amd64; of course, it is absolutely 
computer-independent, so, just include the line

dev-tex/mh ~amd64

to your package.keywords

Sorry for all this mess; this is not me who created it.

2. wxmaxima-0.7.5 is also in the science overlay.

3. If you want to use maxima from TeXmacs, update to texmacs-1.0.6.14-r1 
from the same overlay.

Have fun,
Andrey