Included some usage documentation

2 jobs for add-cl-script in 2 minutes and 20 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
failed linters #84496

00:02:07

passed tests #84497

00:02:20

 
Name Stage Failure
failed
linters Test
    Uninstalling quadtreegrid-0.0.1:
Successfully uninstalled quadtreegrid-0.0.1
Successfully installed quadtreegrid-0.0.1
$ make check
flake8 --max-line-length=96 quadtreegrid tests setup.py
quadtreegrid/quadtreegrid.py:42:97: E501 line too long (107 > 96 characters)
make: *** [Makefile:5: check] Error 1
Cleaning up file based variables
ERROR: Job failed: exit code 1