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 Job ID Name Coverage
  Test
passed #25903
test_arosics

00:07:45

85.0%
passed #25904
test_styles

00:00:26

 
  Deploy
passed #25905
deploy_pypi

00:00:36