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See merge request !1

README.md

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 # ARCHER 2 LAMMPS course (May 2020)
 
+[![CC BY-NC-SA 4.0][cc-by-nc-sa-shield]][cc-by-nc-sa]
+
 LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) is a widely-used classical molecular dynamics (MD) code. This C++ code is easy to use, incredibly versatile, and parallelised to run efficiently on both small-scale personal computers and CPU/GPU/CPU&GPU HPC clusters. As of 2018, LAMMPS has been used, to some degree, in over 14,000 publications in fields as varied as chemistry, physics, material science, granular and lubricated-granular flow, etc.
 
 The course will be run over three 2.5 hour-long sessions.
@@ -53,4 +55,16 @@ Mac can open the Mac termimal application and use ssh from the command line. How
 
 Windows users should install MobaXterm which provides ssh access, a Unix graphics client and a drag-and-drop file browser.
 
-We will provide accounts on one of our HPC services, for all attendees who register in advance at http://www.archer.ac.uk/training/registration/.
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+We will provide accounts on one of our HPC services, for all attendees who register in advance at http://www.archer.ac.uk/training/registration/.
+
+---
+
+This work is licensed under a
+[Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License][cc-by-nc-sa].
+
+[cc-by-nc-sa]: http://creativecommons.org/licenses/by-nc-sa/4.0/
+[cc-by-nc-sa-image]: https://licensebuttons.net/l/by-nc-sa/4.0/88x31.png
+[cc-by-nc-sa-shield]: https://img.shields.io/badge/License-CC%20BY--NC--SA%204.0-lightgrey.svg
+
+[![CC BY-NC-SA 4.0][cc-by-nc-sa-image]][cc-by-nc-sa]
+