Initial Commit
  BackPropagation not working (yet)
  Example setup for XOR problem with 2 layers.
Working Back Prop.
Next: Save / Load
BackPropagation added to repo
Back Prop with Momentum, XOR tests successfully running.
Changed LMS Phi to Hyperbolic Tan.
Fixed bug in BP routine.
Momentum working, used Hayken pg 135 for eta.
Added a "bias" to NN.
Fixed bug in DeltaW (needed entry for each input, not just for each neuron)
Added routine to create fully connected NN.
Added test routine, loads data, seems to be working...
*NOT* actually working: Momentum :-(
Can create fully connected networks.
To Do:
  Remove the "simple output" layer? Seems redundant.
Merge branch 'master' of https://github.com/PaulGrovesAtUNM/ai