pgestraier - pgestraier: added results order (see test.sql for example)

Log Message:
-----------
added results order (see test.sql for example) to function arguments,
fixed limit (it really returns limit rows, and not limit - offset :-\),
added est_cond_delete(cond) so that we don't leek memory

Modified Files:
--------------
pgestraier:
test.sql (r1.11 -> r1.12)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgestraier/pgestraier/test.sql.diff?r1=1.11&r2=1.12)
pgest.sql (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgestraier/pgestraier/pgest.sql.diff?r1=1.6&r2=1.7)
pgest.c (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgestraier/pgestraier/pgest.c.diff?r1=1.14&r2=1.15)
pgestraier/t:
pgest.t (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgestraier/pgestraier/t/pgest.t.diff?r1=1.6&r2=1.7)