pllua - pllua: Added raw datum support, "fromstring" function, and type

Log Message:
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Added raw datum support, "fromstring" function, and type caching. Updated docs.
A few small bug fixes.

Modified Files:
--------------
    pllua:
        pllua.c (r1.13 -> r1.14)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/pllua.c.diff?r1=1.13&r2=1.14)
        pllua.h (r1.12 -> r1.13)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/pllua.h.diff?r1=1.12&r2=1.13)
        plluaapi.c (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/plluaapi.c.diff?r1=1.14&r2=1.15)
        plluaspi.c (r1.15 -> r1.16)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/plluaspi.c.diff?r1=1.15&r2=1.16)
    pllua/docs:
        index.html (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/docs/index.html.diff?r1=1.1&r2=1.2)

Added Files:
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    pllua/expected:
        plluatest.out (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/expected/plluatest.out?rev=1.1&content-type=text/x-cvsweb-markup)
    pllua/sql:
        plluatest.sql (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/sql/plluatest.sql?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
    pllua:
        plluau.c
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/plluau.c)