Release 1.0.0b17

This release contains a bunch of bug fixes, speed improvements, OpenGL ES compatibility fixes, additional tests, documentation fixes and improvements and the following user-visible changes:

• New !transform filter node for translating, scaling and rotating window nodes
• New !vignette filter node for applying a simple, rectangular vignette (probably more advanced options coming later)
• uniform() random variate now has 53 bits of pseudo-randomness instead of 32 – the beta() and normal() variates based on this are also extended
• The sample() function now returns an RGBA 4-vector
• Addition of run_time and frame global names
• !video nodes have new trim= and back_and_forth= attributes for controlling trimming and looping backwards
• New algorithm for computing !sphere meshes that generates half as many faces, with more even sizes
• New quaternion(), qmul() and slerp() built-in functions for making and manipulating quaternions
• The rotate= attribute of 3D !transform nodes now accepts a 4-vector unit quaternion for specifying arbitrary rotations

Full Changelog: v1.0.0b16...v1.0.0b17