v1.30.2

-- Add functionality to allow unit testing of MainGUI and add unit test that launches MainGUI and generates HRF for group. The biggest change is in MainGUI and supporting graphics functions to always specify the axes handle for built-in axes display functions such plot, hold, xlim, ylim, xlabel, ylabel, legend, etc. rather than letting the axes defalt to gca.

-- Add UnitTestsAll_MainGUI to UnitTestsAll to run some basic checks on MainGUI.

-- Fix broken unit tests because the user function hmrR_Intensity2OD was changed to prompt user for input if input data was negative. Changed hmrR_Intensity2OD to detect when it is being run in unit test and with global UNIT_TEST variable and to not accept user input in that case if it is set to true.