New experimental GP parser release

[Bill Allombert <allomber@math.u-bordeaux.fr>]

Hello PARI-dev,

I have made available a new version of my experimental GP parser:
<http://pari.math.u-bordeaux.fr/~bill/pari-2.2.8.bill-8.tar.gz>

This version is up-to-date with current CVS and support a new
experimental construct:

Instead of if(COND,EXP1,EXP2); you can write

if(COND)
(
 EXP1
)
(
 EXP2
);

and in place of for(a=1,n,EXP);
for(a=1,n)
(
 EXP
);

I am evaluating if I could use {} instead of () to brace expressions,
without breaking backward compatibility. Note that this is currently
implemented for every functions, not just if() and for, so you can
do silly things like gcd(a)(b).

If you have proposals for similar syntax extensions to make GP
scripts more readable, tell us and I will try whether this is
doable.

Cheers,
Bill.