uploaded phuong's new (corrected) variable-based binary predictors, editable-multipurpose-glasspane-in-glyph impemented, interactive histograms updated to be adaptive to number of attributes, attribute value listing updated to be flexible, updated glyph color palette, added activity bar to indicate when new predictor/model is being loaded (loading of predictors/models moved to separate thread to avoid freezing gui), and miscellaneous other bugfixes and refactorings