Add mapColumn to SP
Change mapPotential1D to support N-dimensional topology
Merge branch 'issue-125' into issue-121
Merge branch 'issue-125' into issue-121
Fix bug with mapPotential caused by bad merge
Renamed mapPotential1D to mapPotential
Ensure compatibility with Python
Merge branch 'issue-125' into issue-121
Merge branch 'master' into issue-121
Merge branch 'master' into issue-121
Merge pull request #129 from chetan51/issue-121

Extend SP to support N-dimensional topology
Revert "Remove $NTA"

This reverts commit 467391414788a7255f85bdbfae913f3b0df2fd04.
Merge pull request #143 from chetan51/revert_4673914147

Revert "Remove $NTA"
Merge branch 'master' of https://github.com/numenta/nupic.core into google-test-compile