v1.31.8

-- Handle empty config file in ConfigFileClass and configSettingsGUI. Fix issues with GUI being too narrow with only one column of parameters. Add GUI argument for number of param panels per column to easily test GUI with various param dimensions (i.e., nrows X ncols).
-- Break up code in configSettingsGUI.m into functions to make it more manageable.
-- Add better GUI repositioning code using rePositionGuiWithinScreen
-- Rename section property to param and section.param to param.valueOptions in ConfigFileClass to more accurately reflect their function.  Also add methods for accessing param properties, name val and valOptions.