added #295 document allow_registration to changes.rst

docs/CHANGES.rst

@@ -7,6 +7,7 @@ Changelog
 * Norwegian Bokmål translations. [Andreas Lorentsen]
 * Updated Afrikaans translations. [jcbrand]
 * Add responsiveness to CSS. We now use Sass preprocessor for generating CSS. [jcbrand]
+* #295 Document "allow_registration". [gbonvehi]
 
 0.8.6 (2014-12-07)
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