pllua - pllua: Modified raw datum to carry datum instead of datum

Log Message:
-----------
Modified raw datum to carry datum instead of datum pointer, added memory
context for PL/Lua, and added server.rows.

Modified Files:
--------------
pllua:
pllua.c (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/pllua.c.diff?r1=1.14&r2=1.15)
pllua.h (r1.13 -> r1.14)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/pllua.h.diff?r1=1.13&r2=1.14)
plluaapi.c (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/plluaapi.c.diff?r1=1.15&r2=1.16)
plluaspi.c (r1.16 -> r1.17)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pllua/pllua/plluaspi.c.diff?r1=1.16&r2=1.17)