Prepare changelog for v0.10.3-rc.2

Author: dbkr

CHANGELOG.md

@@ -1,3 +1,14 @@
+Changes in [0.10.3-rc.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.10.3-rc.2) (2017-09-05)
+===============================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.10.3-rc.1...v0.10.3-rc.2)
+
+ * Fix plurals in translations
+   [\#1358](https://github.com/matrix-org/matrix-react-sdk/pull/1358)
+ * Fix typo
+   [\#1357](https://github.com/matrix-org/matrix-react-sdk/pull/1357)
+ * Update from Weblate.
+   [\#1356](https://github.com/matrix-org/matrix-react-sdk/pull/1356)
+
 Changes in [0.10.3-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.10.3-rc.1) (2017-09-01)
 ===============================================================================================================
 [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.10.2...v0.10.3-rc.1)