Simpler strign representation
Reduced number of tests
Updated approximation scale
Several bug fixes in flatten_iterative
Merge branch 'master' of github.com:rougier/gl-bezier

* 'master' of github.com:rougier/gl-bezier:
  [behdad] Add another degenerate example
  [behdad] Rename perpendicular() to ortho()
  [behdad] Minor
  Speed-up Arc.tangents()