message: Prepare changelog for v1.0.0
diff: +Changes in [1.0.0](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v1.0.0) (2019-02-14)
  +===================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v1.0.0-rc.2...v1.0.0)
  +
  + * Update from Weblate.
  + [\#2646](https://github.com/matrix-org/matrix-react-sdk/pull/2646)
  + * Remove 'welcome' from top-left menu
  + [\#2641](https://github.com/matrix-org/matrix-react-sdk/pull/2641)
  + * Turn on pin unread rooms for everyone
  + [\#2645](https://github.com/matrix-org/matrix-react-sdk/pull/2645)
  + * Update help buoy text and issue links
  + [\#2640](https://github.com/matrix-org/matrix-react-sdk/pull/2640)
  + * Fix icons being cut off in settings
  + [\#2644](https://github.com/matrix-org/matrix-react-sdk/pull/2644)
  + * Add credit for cover photo usage
  + [\#2643](https://github.com/matrix-org/matrix-react-sdk/pull/2643)
  + * make e2e icons on message transparent
  + [\#2642](https://github.com/matrix-org/matrix-react-sdk/pull/2642)
  + * fix close button being half off screen
  + [\#2639](https://github.com/matrix-org/matrix-react-sdk/pull/2639)
  + * Fix excessive timeline whitespace
  + [\#2638](https://github.com/matrix-org/matrix-react-sdk/pull/2638)
  + * Remove the white screen of welcome
  + [\#2637](https://github.com/matrix-org/matrix-react-sdk/pull/2637)
  + * always rerender room tiles
  + [\#2636](https://github.com/matrix-org/matrix-react-sdk/pull/2636)
  +
  Changes in [1.0.0-rc.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v1.0.0-rc.2) (2019-02-14)
  =============================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v1.0.0-rc.1...v1.0.0-rc.2)
  