Outline of changes in the next version:
  int becomes 64bit
  times change from float to int, and specced in milliseconds
  merge SECONDS and STAMP
  abolish STAMP_CONTAINS and FUTURE_SECONDS

- dialog media info (steal ideas from UIML or base it on it):
  http://victor.worldforge.org:8080/rt/Ticket/Display.html?id=317
- binary2
- sprites.xml -> media info
- specify operations and their args semantically much more than currently is done:
  especially movement modes
