message: Update changelog for recent development work
diff: - Updated geometry token syntax from %TOKEN to \<TOKEN\>.
  - Replaced readXIncludes boolean with a readXIncludeFunction callback in the XmlReadOptions structure.
  - Combined individual options into an XmlWriteOptions argument for the XML write functions.
  +- Extended functionality of the vector and matrix classes.
  +- Updated PyBind11 library to version 2.2.3.
  +- Updated PugiXML library to version 1.9.
  +
  +### Fixed
  +- Fixed graph implementations of range, extract, and ramp4 nodes.
  ## [1.36.0] - 2018-07-23
  