Merge pull request #1 from jmmcd/master

Use sum instead of reduce-add.
Reimplementation in Mathematica of TINY_GSGP.py
Mathematica implementation of GSGP
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TINY_GSGP notebook file
Geometric Semantic Hill Climber
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Create TINY_GSHCGP.nbtxt
Create TINY_GSHCGP.nb
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Create TINY_GSHCGP _ARIT.nbtxt
Create TINY_GSHCGP _ARIT.nb
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Create TINY_GSGP_ARIT.nbtxt
Create TINY_GSGP_ARIT.nb
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Use NUMVARS when calling the evolved function.