Original commit message from CVS:
* docs/design/part-TODO.txt:
* docs/design/part-clocks.txt:
* docs/design/part-events.txt:
* docs/design/part-gstbin.txt:
* docs/design/part-gstelement.txt:
* docs/design/part-gstpipeline.txt:
* docs/design/part-live-source.txt:
* docs/design/part-messages.txt:
* docs/design/part-overview.txt:
* docs/design/part-states.txt:
Many doc updates.