Original commit message from CVS:
The first wave of docs updates
Added a little more comments about the API usage in the api docs.
Some fixes for the capsnego testsuite.
Original commit message from CVS:
More work on capsnego proxying. It should be OK now.
Added another testcase enum that shows various capsnego algorithms.
Warn about pads that try to set a capability incompatible with their
padtemplate.
Implemented refcounting and copy_on_write for caps/props.
