Remove class-to-interface-struct cast macros which don't work,
don't make sense, and in some cases wouldn't even compile if
used. Removal should be ok seeing that code which uses any of
these is broken and bound to crash. Fixes#565607.
API: remove GST_IMPLEMENTS_INTERFACE_CLASS
API: remove GST_IS_IMPLEMENTS_INTERFACE_CLASS
API: remove GST_URI_HANDLER_CLASS
Original commit message from CVS:
* gst/gstinterface.h:
GST_IMPLEMENTS_INTERFACE and GST_IS_IMPLEMENTS_INTERFACE use the normal
GInterface type checking.
They were previously using non-defined macros.
Original commit message from CVS:
put symbols in the sections.txt into the right sections (so that we dont get wrong undocumented symbols)
added TITLE tags where they were missing
fixed section names so that gtk-doc introspection works
fixed typos in api docs and docbook docs
added some thoughts about new interfaces (to personal notes)