NAN ROI fix
put the CategoricalComponent into a clean branch.
put a slightly-hacky way of loading catagorical data. Needs a more robust implemntation
Integrated categoricalCoponent assocaited changes into ScatterClient
Debugging issues with figure drawing
Fixed issues related to GUI presentation
fixed issue of no-reticking after changing between Categorical and continious in the gui
Small cleanup
PEP8
Merge pull request #229 from ChrisBeaumont/clean-categorical-component

Categorical Components