MeanRSA now support multiple (non-overlapping) predictors
new kendall_a method, subclassing predictY to average runs before predicting
new customfits functionality for doing non-standard RFX analysis (e.g. fitting slopes with the new fitslope sub-function
documentation
added numformat and keepvalues options
replaced vec2str with mat2strcell
better nan handling, additional tests for robustness
additional assertions to catch bad inputs
more sensible default inputs
convenience function for enforcing a 0 diagonal in a symmetrical matrix