Revert "Warning: sp.avgConnectedSpanForColumn2D_ returns a Real"
Revert "Warning: sp.avgConnectedSpanForColumn2D_ returns a Real"

This reverts commit 3e9d140423f7aebeca286186c9e4f0bca85700f8.
makes tests fail, investigate later

breznak/nupic,breznak/nupic,breznak/nupic