Added Zenodo badge and citation hint to README.rst. Updated version info.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
3 jobs for v0.9.10 in 8 minutes and 48 seconds (queued for 23 minutes and 52 seconds)
latest
Status Name Job ID Coverage
  Test
passed test_arosics #25903

00:07:45

85.0%
passed test_styles #25904

00:00:26

 
  Deploy
passed deploy_pypi #25905

00:00:36