Initial work to add in module for storage/modification and eventually persistent saving of user settings. Seems better than feeding settings through multiple UI classes for no real reason
Some more work toward ccdc_settings.py module as configuration central
Added option for user to specify the (MATLAB) dates for get_prediction
Moved CCDCTimeSeries._todict out of class and renamed as mat2dict
Added two utility functions to convert to/from MATLAB dates from/to Python datetime
Progress toward one file for all config settings
Added new tab to control panel for image symbology options.
Change to store band min/max for all bands for symbology
Finalized symbology tab. Now can control symbology for all layers within image time series at once.