libpqtypes - libpqtypes: Several bug fixes, add PQregisterComposites,

Log Message:
-----------
Several bug fixes, add PQregisterComposites, PQregisterSubClass, PQregisterUserDefinedTypes. Deprecated PQregisterTypeHandler (now just a wrapper to new PQregisterXXX functions), updated change log with details, bumped libpqtypes versioning to 1.4 due to API changes

Modified Files:
--------------
libpqtypes:
ChangeLog (r1.39 -> r1.40)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/ChangeLog?r1=1.39&r2=1.40)
configure.ac (r1.22 -> r1.23)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/configure.ac?r1=1.22&r2=1.23)
libpqtypes/src:
events.c (r1.9 -> r1.10)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/events.c?r1=1.9&r2=1.10)
handler.c (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/handler.c?r1=1.15&r2=1.16)
libpqtypes-int.h (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/libpqtypes-int.h?r1=1.15&r2=1.16)
libpqtypes.h (r1.25 -> r1.26)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/libpqtypes.h?r1=1.25&r2=1.26)
misc.c (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/misc.c?r1=1.7&r2=1.8)
regression-test.c (r1.21 -> r1.22)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/regression-test.c?r1=1.21&r2=1.22)
spec.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/spec.c?r1=1.5&r2=1.6)