Added license section to the english version of the BCoC.

Author: catalanojuan

source/localizable/_code-of-conduct.en.md

@@ -66,3 +66,7 @@ Scope
 
 We expect all community participants (contributors, paid or otherwise; sponsors; and other guests) to abide by this Code of Conduct in all community venues—online and in-person—as well as in all one-on-one communications pertaining to community business.
 
+License‭ ‬and‭ ‬attribution
+-----------------------
+
+Berlin ‬Code‭ ‬of‭ ‬Conduct‭ ‬by http://rubyberlin.github.io/code-of-conduct/ is‭ ‬distributed‭ ‬under‭ ‬a‭ ‬Creative‭ ‬Commons‭ ‬Attribution-ShareAlike‭ ‬license.