Prepare changelog for v0.8.6-rc.3

Author: richvdh

CHANGELOG.md

@@ -1,8 +1,11 @@
-unreleased
-==========
+Changes in [0.8.6-rc.3](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.8.6-rc.3) (2017-02-03)
+=============================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.8.6-rc.2...v0.8.6-rc.3)
+
  * Fix deviceverifybuttons
    [5fd7410](https://github.com/matrix-org/matrix-react-sdk/commit/827b5a6811ac6b9d1f9a3002a94f9f6ac3f1d49c)
 
+
 Changes in [0.8.6-rc.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.8.6-rc.2) (2017-02-03)
 =============================================================================================================
 [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.8.6-rc.1...v0.8.6-rc.2)