Made tentative change to heterogeneity calculation -- replaced negative values for pixels below noise threshold to NaNs
Changed save function of a patient to make the variable name the patient ID
updateImagePanels.m did not perform correct check for heterogeneity images because they have some NaN values. Note: NaNs may be removed in future versions
Corrected version number to 1.46
Removed versionNumber.txt -- back into development mode
Merged with master (updates to the heterogeneity code)