libpqtypes - libpqtypes: renaming hooks.c to events.c to match new

Log Message:
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renaming hooks.c to events.c to match new interface name

Added Files:
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libpqtypes/src:
events.c (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/events.c?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
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libpqtypes/src:
hooks.c
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/libpqtypes/libpqtypes/src/hooks.c)