plpsm - plpgpsm: scrollable cursors support, first iteration

Log Message:
-----------
scrollable cursors support, first iteration

Modified Files:
--------------
    plpgpsm/src:
        gram.y (r1.54 -> r1.55)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/gram.y.diff?r1=1.54&r2=1.55)
        pl_exec.c (r1.57 -> r1.58)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/pl_exec.c.diff?r1=1.57&r2=1.58)
        pl_funcs.c (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/pl_funcs.c.diff?r1=1.9&r2=1.10)
        plpgpsm.h (r1.43 -> r1.44)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/plpgpsm.h.diff?r1=1.43&r2=1.44)
        scan.l (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/plpsm/plpgpsm/src/scan.l.diff?r1=1.14&r2=1.15)