added olex2 for MX small molecules

olex2/modulefile

@@ -0,0 +1,12 @@
+#%Pmodule
+
+module-whatis       "OlexSys Ltd is a scientific software company providing State of the Art Crystallographic Software as well as the best Laboratory Chemicals Management there is."
+module-url          "https://www.olexsys.org/categories/installation/"
+module-license      "Olex2 is completely free to use for anyone. There is no catch here – whether you are in industry, academia or a student, it’s free!"
+module-maintainer   "MX Data <jiaxin.duan@psi.ch>"
+
+module-help     "
+Olex2 is open source – all our code is available for you to look at, check and – hopefully!
+"
+
+setenv          Olex2                     $PREFIX/bin