message: Chore update changeglog.
diff: +## X.Y.Z (INSERT_DATE_HERE)
  +
  +#### Minor Changes
  +
  +* [Micro Optimizations.](https://github.com/SAP/chevrotain/commit/41543670d6cb46b151f214bc38285eb144b94fe0)
  +
  +#### Documentation
  +
  +* [New documentation website generated using vuepress.](sap.github.io/chevrotain/docs)
  +
  +
  +
  ## 3.1.0 (4-13-2018)
  #### Major Changes
  