Decide on how to copy the data most efficiently

[freddie-freeloader]

• Sheetreader-R, Sheetreader-Python, & newRow() use the following method (copy by row):

    for (currentBuffer = 0; currentBuffer < maxBuffers; ++currentBuffer) {
    	for (currentThread = 0; currentThread < mCells.size(); ++currentThread) {
    		for (currentCell = 0; currentCell <= cells.size(); ++currentCell) {
                    ...
  }}}

  So they copy row by row, since this is how sheetreader stores the data in mCells
• In theory, we could do it like this (copy by column):

  for(column : columns) {
    for (auto currentLocation : orderedLocations) { ... } }