property registration convenience methods

I added a convenience method and macros (based largely off of zend_do_declare_property) to ease extensions registering their own default properties. The patch is available at http://www.schlossnagle.org/~george/php/zend_api.patch. If someone (Zeev, Andi?) could look this over and give me the ok to commit it, that would be great. -- George Schlossnagle -- Principal Consultant -- OmniTI Computer Consulting, Inc. -- +1.410.872.4910 x202 -- 1024D/1100A5A0 1370 F70A 9365 96C9 2F5E 56C2 B2B9 262F 1100 A5A0