Added URL checker and corresponding CI job. Fixed dead links. Updated...

Added URL checker and corresponding CI job. Fixed dead links. Updated installation procedure documentation.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
4 jobs for v0.4.7 in 1 minute and 32 seconds (queued for 2 seconds)
latest
Status Name Job ID Coverage
  Test
passed test_sensormapgeo #52911

00:00:54

87.0%
passed test_styles #52912

00:00:07

passed test_urls #52913

00:00:16

 
  Deploy
passed deploy_pypi #52914

00:00:13