Add changelog and rename readme extension.

Author: jcbrand

CHANGES.md

@@ -0,0 +1,17 @@
+# Changelog
+
+## 0.0.4 (15 October 2014)
+
+* Merge pull request #40 from allan-simon/more_precise_control_on_roster_update_events
+* Merge pull request #38 from pelish8/master
+* Merge pull request #31 from arielscarpinelli/archive-preferences
+* mug: Buefix, don't deregister handler when receiving presence stanza containing an error. 
+* muc: Added ability to invite multiple users.
+* muc: New method createConfiguredRoom
+* muc: IE9 fixes.
+* Create strophe.mam.v0.3.js
+
+## 0.0.3 (23 Auguest 2014)
+
+* Merge pull request #35 from jaygeeseman/fuck_ie8
+* Fix IE9 errors in Strophe.muc