Midway through adding event acknowledgement
Center tiles (only, oddly enough) now exhibit full threading.
Fully threaded tiles running DHS.
Fixed 'Acknowledgement' spelling
Start of better statistics; counts events by memory region
More stats; counts events based on locking mechanism
Sorters made from Res start with their parent's threshold
Remove non-const T& atom access in Tile (Part 1)
Remove non-const T& atom access in Tile (Part 2): Also via EventWindow
Remove non-const T& atom access in Tile (Part 3): Also via Grid
Keep working towards const correctness.
Add an Atom::Print(FILE *) interface and implement it.  Also, make p1atom zero the state field on init.
Misc cleanups.  Especially, remove horrible cuttenpaste from gridrenderer.
Show grid on startup