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 branch 'master' into issue-837
Remove unnecessary semicolons
Adds regression test badge.

Organizes other badges in a list. Fixes #1039.
Merge branch 'master' into issue-837
Merge pull request #1040 from rhyolight/add-regression-badge

Adds regression test badge.
Ensure compatibility with C++
Point to updated nupic.core
Replaces dashes in all nupic.cluster.database.nameSuffix with underscores as dashes break SQL. resolves #1051
Merge branch 'master' into issue-837
Merge pull request #1057 from iandanforth/nup1051

Replaces dashes in all nupic.cluster.database.nameSuffix with underscore...