add link to Lua 2015 Workshop

README.rst

@@ -22,6 +22,8 @@ Documentation
 See `Ravi Documentation <http://the-ravi-programming-language.readthedocs.org/en/latest/index.html>`_.
 As more stuff is built I will keep updating the documentation so please revisit for latest information.
 
+Also see the slides I presented at the `Lua 2015 Workshop <http://www.lua.org/wshop15.html>`_.
+
 Status
 ------
 The project was kicked off in January 2015. 

readthedocs/ravi-overview.rst

@@ -22,6 +22,8 @@ Documentation
 See `Ravi Documentation <http://the-ravi-programming-language.readthedocs.org/en/latest/index.html>`_.
 As more stuff is built I will keep updating the documentation so please revisit for latest information.
 
+Also see the slides I presented at the `Lua 2015 Workshop <http://www.lua.org/wshop15.html>`_.
+
 Status
 ------
 The project was kicked off in January 2015.