Update README in prep for v1.0

Author: dshean

README.md

@@ -71,7 +71,7 @@ https://github.com/ICESAT-2HackWeek/jupyterhub-info.
 ## Citation and License
 Most of the tutorial content is original material prepared by a team of volunteer instructors, all of whom have day jobs as scientists, engineers, and educators.  While this material is not necessarily appropriate for a peer-reviewed journal article publication, we released the tutorial material with a digital object identifier (DOI).  If you find these tutorials useful, or you adapt some of the underlying source code, we request that you cite as:
 
->Anthony Arendt, David Shean, Ben Smith, Amy Steiker, Alek Petty, Fernando Perez, Scott Henderson, Fernando Paolo, Johan Nilsson, Maya Becker, Susheel Adusumilli, Daniel Shapero, Bruce Wallin, Axel Schweiger, Suzanne Dickinson, Nicholas Hoschuh, Matthew Siegfried, Thomas Neumann. (2019). ICESAT-2HackWeek/ICESat2_hackweek_tutorials (Version 0.1). Zenodo. http://doi.org/10.5281/zenodo.3360994
+>Anthony Arendt, Ben Smith, David Shean, Amy Steiker, Alek Petty, Fernando Perez, Scott Henderson, Fernando Paolo, Johan Nilsson, Maya Becker, Susheel Adusumilli, Daniel Shapero, Bruce Wallin, Axel Schweiger, Suzanne Dickinson, Nicholas Hoschuh, Matthew Siegfried, Thomas Neumann. (2019). ICESAT-2HackWeek/ICESat2_hackweek_tutorials (Version 1.0). Zenodo. http://doi.org/10.5281/zenodo.3360994
 
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