message: Finalize changelog for MaterialX 1.35.3
diff: # Change Log
  -## [1.35.3] - Development
  +## [1.35.3] - 2017-10-11
  ### Added
  - Added support for Python 3.
  - Added support for standard TypeDef attributes.
  -- Added method Element\:\:setName.
  - Added support for values of type 'stringarray'.
  +- Added method Element\:\:setName.
  - Extended Python bindings for Document, NodeGraph, MaterialAssign, and Collection.
  ### Changed
  