[Maxima] Maxima 5.21.1 release

[Robert Dodier]

Hi,

I've tagged version-5_21_1 in CVS and built rpm's and posted
the rpms and source code to the Sourceforge file manager.
http://sourceforge.net/projects/maxima/file or thereabouts.

In version some bugs are fixed, including a plotting bug and
the is(f("x") > 0) => Lisp error bug.

I'm working on a change log. Sorry, I haven't finished it yet.

If someone can build a Windows installer that would be awesome.

If there aren't too many problems with this version,
I;ll make a general announcement.

hope this helps

Robert Dodier