Intro to Two.Texture, Two.Sprite, and Two.ImageSequence

Two.js now supports rendering bitmap imagery in the SvgRenderer and CanvasRenderer through the underlying Two.Texture class. Dynamically add and manipulate images, animated gifs, and even videos to your Two.js scene. This is a prerelease candidate and while the API isn't planning to change the implementation of bitmap functionality is incomplete (i.e: the WebGLRenderer hasn't been fully implemented yet). In addition to this introduction, third party libraries have been completely removed and Two.js is now compatible with headless development. For a full list of changes see the change log.