contribution to GiNaC IO "philosophy"

[Vaclav Smilauer]

Hi folks.

I sketched some very basic stuff around GiNaC::ex output. It could 
eventually handle all printing, uniformly and FROM ONE PLACE in the 
source. I am very interested in your comments on it as it serves nothing 
else; it is not useful yet.

Some issues are addressed in the source. It is heavily commented and 
easy to understand. Have a look at it: 
http://www.volny.cz/smilauer/ginac_o.cc.

Regards.

Vaclav Smilauer