HTM process optimizations

[Paul_Lamb]

@rhyolight

#1 and #2 make sense and I think that’s how it works in NuPIC.

I don’t think NuPIC uses the second optimization, though. I see the following default parameters:

"maxSegmentsPerCell": 128,
"maxSynapsesPerSegment": 128,

Optimization #2 is an abstraction of setting the above to this:

"maxSegmentsPerCell": 1,
"maxSynapsesPerSegment": 16384,