Allowing selection of string variables for inputs and outputs in new PI model wizard.
Allowing for selection of non-numeric columns as axes in table and controls.
Adding ordinal scale axis to x
Fixing x and y control buttons in table to work with string columns
Sting variables can now be used for y axis too
Fixing problem with initial load when string column is used as x or y variable. Also fixing problem with color coding.
Fixing issue with selection
clean up
Merge branch 'pim-strings'