#14 Improve the load & save speed for the RAW method

[Marcus Geelnard]

The RAW method uses a very simple for-loop that reads/writes each integer and each float in a separate call to the stream read/write functions.

The more optimal solution would be to use buffered reads/writes - but be careful not to use too much memory (RAW should have a smaller memory footprint than MG1 and MG2)!