Refinements to presentation of Numerical statistics. Now also excludes responses with a space ( ' ' ) to avoid minimums of "0" displaying in lieu of s space. Actual zeros will still be displayed and used in calculations of quartiles.

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/trunk/unstable@624 b72ed6b6-b9f8-46b5-92b4-906544132732