Original commit message from CVS:
* docs/design/draft-push-pull.txt:
* docs/design/part-MT-refcounting.txt:
* docs/design/part-TODO.txt:
* docs/design/part-caps.txt:
* docs/design/part-events.txt:
* docs/design/part-gstbus.txt:
* docs/design/part-gstpipeline.txt:
* docs/design/part-messages.txt:
* docs/design/part-push-pull.txt:
* docs/design/part-query.txt:
Some more docs.