v3.5.0

Changes in this version:

• New projective sampling based integrators, see PR #997 for more details.
  Here's a brief overview of some of the major or breaking changes:

  • New prb_projective and direct_projective integrators
  • New curve/shadow optimization tutorial
  • Removed reparameterizations
  • Can no longer differentiate instance, sdfgrid and Sensor's positions