Create CITATION.cff (#79)

Author: fandreuz

CITATION.cff

@@ -0,0 +1,20 @@
+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+authors:
+- family-names: "Gadalla"
+  given-names: "Mahmoud"
+  orcid: "https://orcid.org/0000-0001-9507-9468"
+- family-names: "Tezzele"
+  given-names: "Marco"
+  orcid: "https://orcid.org/0000-0001-9747-6328"
+- family-names: "Mola"
+  given-names: "Andrea"
+  orcid: "https://orcid.org/0000-0002-4483-0212"
+- family-names: "Rozza"
+  given-names: "Gianluigi"
+  orcid: "https://orcid.org/0000-0002-0810-8812"
+title: "BladeX: Python Blade Morphing"
+version: 0.1
+doi: 10.21105/joss.01203
+date-released: 2019-02-4
+url: "https://github.com/mathLab/BladeX"