v1.21.1

-- Step 1 of changing the way Homer3 stores the group data in memory, how it saves processed data and loads processed and acquired data. It currently loads entire data from derived and acquired files into memory. The goal is to save the output of processing to files instead of storing it in memory and to load the derived output and acquired data only of the current element. In this way Homer3 will be able to handle arbitrarily large data sets.
-- In this step get rid of the half-measure used previously to handle large data sets by not storing dc and dod and calculating them automatically when Homer3 starts up by sensing that there's derived data that was previously calculated in groupResults.mat