Bouncing off walls.
Paddle bounce.

No fancy direction randomization yet.
Consider ball size on right wall bounces.
Added note about used coordinate convention.
Style change: Use boolean operators for logical operations.
Move in left and right wall by one tile.

This allows us to use a whole number of 8-tile blocks.
Block rendering.
Make blocks two tiles high.
Moved blocks down further.
Added switch to pause game logic updating.

Mainly useful to have a nice static picture to look at while
debugging.
Added timing constraint for global clock.

There is still quite a bit of slack, but we have been
blissfully ignoring the amount of levels of logic generated
so far, and this might get us into trouble as the design gets
more and more packed.
Switched to 720Hz game logic.

Allows us to never have objects move faster than one pixel a time step.
New staged physics implementation.

Will hopefully make block collisions easier.

For some reason, the maximum clock frequency *decreased*,
need to look into this.
Added missing sensitivity list entries.
Collision detection for blocks.