Forin support added to compiler!

- Small bugfixes in igr dot parser
- Added an oepration to copy nodes
- Added forin functionality to compound converter
- Added a file that performs a whole bunch of igr transformations to get forin working
- Some changes to Ascatter/Agather in the converter
- Small bugfix in tokenizer
- Made the native dvm_range return an inclusive range (last integer also part of the range)
- Added test case for forin