Added mapColumn function
Updated mapPotential to support N-dimensional topology (but it's too slow right now)
Renamed variables
Optimized getNeighborsND
Simplified code
Update test
Ensure inputDimensions and columnDimensions have at least 1 dimension
Cleaned up avgConnectedSpanForColumnND
Better error messages for assertions
Merge branch 'master' into issue-837
Merge pull request #989 from baroobob/master

Fixed some typos in the comments.
Add initial version number to python module resolves #991
Merge pull request #992 from iandanforth/991

Add initial version number to python module resolves #991
Updates nupic.core to d006e070ecb5a0f1dc2ef7b55251bdeca95b0e84.
Updates nupic.core to e699d5ea1b63d51a4e8f6253af59dd2c11610362.
Updates nupic.core to ab6da795866eff2ff26d2df53c233fe9daaeb63c.
Updates nupic.core to 2866f3517976f3c9d3a5ccf8d5c883f91af59ad9.
Updates nupic.core to 55a9fd1e4621b2a08e6cab453229f24453c6107a.
Updates nupic.core to 0a86854fce9352ec6b3a0f6a2ab1339f83d3ab2c.
Merge pull request #1000 from numenta-ci/core-update-sha

Updates nupic.core to latest built SHA.