back on track

I've fixed a bug in the inference rules for the example.

I've reworked the inference engine to use less memory.

And I've defined a maxRelations parameter, default is 120, though that's rather small. Still, it allows everything to run without needing to increase the default memory allocation.

Things are looking good. I also realized that the rebuild will run much faster if I give it more ram. Duh! Indeed, if I increase the block cache parameter from 500 to 2000, it will likely complete in only a few minutes. (Remember that blocks are 32KB.)

So a release today is looking very likely.

Bill