Revision 12 Version 13

I have to see the import/export csv files using  BigIntegers, but I think I have almost the final version of M2000. So you can wait for the 13th revision or grab this from here: https://github.com/M2000Interpreter/Environment/releases/tag/Version13Revision12

Version 13, Revision 10

 This is a huge wotk on version 13. My goal was to optimize the code. So one optimization done on mArray class. This is the object behind the multidinension array. I made a new class, the tuple which hold the functionality of mArray but works with one or zero dimension. So this tuple now need less resources.