Patch update to 2.2.3

2.2.3 - April 13 2017

• Added HTML import targets.

• Added support for animating SVG related properties:

  • fill
  • floodColor
  • lightingColor
  • stopColor
  • strokeDashoffset
  • strokeDasharray

• Fixed crash when animating non-invertable matrices.

• Fixed source maps for Bower installs.

• Updated README.md documentation structure.

• Added 'use strict' to source files.