libpqtypes - libpqtypes: created pqt_buf_xxx functions to abstract

Log Message:
-----------
created pqt_buf_xxx functions to abstract reading and writing integers to/from buffers, which is now done differently depending on new config macro STRICT_MEMORY_ALIGNMENT

Modified Files:
--------------
libpqtypes/src:
array.c (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/array.c.diff?r1=1.3&r2=1.4)
datetime.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/datetime.c.diff?r1=1.5&r2=1.6)
geo.c (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/geo.c.diff?r1=1.6&r2=1.7)
libpqtypes-int.h (r1.7 -> r1.8)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/libpqtypes-int.h.diff?r1=1.7&r2=1.8)
misc.c (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/misc.c.diff?r1=1.3&r2=1.4)
numerics.c (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/numerics.c.diff?r1=1.3&r2=1.4)
record.c (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/record.c.diff?r1=1.3&r2=1.4)
utils.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/utils.c.diff?r1=1.4&r2=1.5)