Prepare changelog for v0.10.5

Author: dbkr

CHANGELOG.md

@@ -1,3 +1,9 @@
+Changes in [0.10.5](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.10.5) (2017-09-21)
+=====================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.10.4...v0.10.5)
+
+ * Fix build error (https://github.com/vector-im/riot-web/issues/5091)
+
 Changes in [0.10.4](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.10.4) (2017-09-20)
 =====================================================================================================
 [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.10.4-rc.1...v0.10.4)