Maciek M

I have made a few changes for my own use that I think others might benefit from, hence this pull request. The new features are: * support for sparse matrices,...

use shebang and shell syntax compatible with Ubuntu 22.04

1

Make it possible to run reslang on Ubuntu 22.04 (my work laptop OS). Without these, `./install-reslang` produces: ``` ./install-reslang: 12: Syntax error: Bad fd number ``` And `reslang` produces: ```...