message: Prepare changelog for v0.13.4-rc.1
diff: +Changes in [0.13.4-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.13.4-rc.1) (2018-09-07)
  +===============================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.13.3...v0.13.4-rc.1)
  +
  + * Error on splash screen if sync is failing
  + [\#2155](https://github.com/matrix-org/matrix-react-sdk/pull/2155)
  + * Do full registration if HS doesn't support ILAG
  + [\#2150](https://github.com/matrix-org/matrix-react-sdk/pull/2150)
  + * Re-apply "Don't rely on room members to query power levels"
  + [\#2152](https://github.com/matrix-org/matrix-react-sdk/pull/2152)
  + * s/DidMount/WillMount/ in MessageComposerInput
  + [\#2151](https://github.com/matrix-org/matrix-react-sdk/pull/2151)
  + * Revert "Don't rely on room members to query power levels"
  + [\#2149](https://github.com/matrix-org/matrix-react-sdk/pull/2149)
  + * Don't rely on room members to query power levels
  + [\#2145](https://github.com/matrix-org/matrix-react-sdk/pull/2145)
  + * Correctly mark email as optional
  + [\#2148](https://github.com/matrix-org/matrix-react-sdk/pull/2148)
  + * guests trying to join communities should fire the ILAG flow.
  + [\#2059](https://github.com/matrix-org/matrix-react-sdk/pull/2059)
  + * Fix DM avatars, part 3
  + [\#2146](https://github.com/matrix-org/matrix-react-sdk/pull/2146)
  + * Fix: show spinner again while recovering from connection error
  + [\#2143](https://github.com/matrix-org/matrix-react-sdk/pull/2143)
  + * Fix: infinite spinner on trying to create welcomeUserId room without consent
  + [\#2147](https://github.com/matrix-org/matrix-react-sdk/pull/2147)
  + * Show spinner in member list while loading members
  + [\#2139](https://github.com/matrix-org/matrix-react-sdk/pull/2139)
  + * Slash command to discard megolm session
  + [\#2140](https://github.com/matrix-org/matrix-react-sdk/pull/2140)
  +
  Changes in [0.13.3](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.13.3) (2018-09-03)
  =====================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.13.3-rc.2...v0.13.3)
  