STATS_CLUS_SIL_2.0.4

Fix for the None comparison in sort problem due to Python 3 change

STATS_CLUS_SIL_2.0.3

The histogram in the currently posted version is broken, which is really weird, since it's code that I don't recall touching for a long time. The generated syntax has a small error, which this update fixes.

STATS_CLUS_SIL_2.0.2

Author updates.

STATS_CLUS_SIL_2.0.1

Ignore missing values in cluster assignment.

STATS_CLUS_SIL_2.0.0

min stats version: 24

STATS_CLUS_SIL_1.0.4

min stats version: 18