Docu update.

8fe91dae · Uwe Schulzweida · 9ffce05a · 8fe91dae · 6130d637
Commit 8fe91dae authored 6 years ago by Uwe Schulzweida
--- a/CITATION
+++ b/CITATION
-If you use the Climate Data Operators (CDO) to process data for an article in a
-scientific publication, please cite:
+If you use the Climate Data Operators (CDO) to process data for an article in a scientific publication, please cite:

+Schulzweida, Uwe. (2019, February 6). CDO User Guide (Version 1.9.6). Zenodo. http://doi.org/10.5281/zenodo.2558193
+
+BibTeX:
 @misc{schulzweida_uwe_2019_2558193,
  author       = {Schulzweida, Uwe},
  title        = {CDO User Guide},

--- a/libcdi @ 6130d637
+++ b/libcdi @ 6130d637
-Subproject commit e8d41cde3c56bb0fb7c9ac0e25d20f65bd69e9bb
+Subproject commit 6130d637d3f2bb0c6dad3b8e9613063fcf281340