v0.9.5, 2012 06 21 -- Initial PyPI release.
v0.9.6, 2012 06 21 -- Including necessary java files.
v0.9.7, 2012 ?? ?? -- Undocumented.
v0.9.8, 2012 10 12 -- Include xmlns for instances.
v0.9.9, 2013 01 22 -- InstanceId always added, new cascade format support.
v0.9.9.1, 2013 01 24 -- bug fix on old xls cascade format support.
v0.9.10, 2013 02 15 -- bug fixes.
v0.9.11, 2013 03 20
    -- cascade as a required field support
    -- bind: relvant with white space ignored
v0.9.12, 2013 03 23
    -- better error reporting in missing headers, missing calculations
    -- support for rows column
