Commits on Jun 6, 2015

1. Implement new WebGL interfaces and methods …

   This commit implements:
   * WebGLFramebuffer
   * WebGLRenderbuffer
   * WebGLTexture
   
   And adds the following methods to `WebGLRenderingContext`:
   * create{Texture,Framebuffer,Renderbuffer}
   * bind{Texture,Framebuffer,Renderbuffer}
   * destroy{Buffer,Texture,Framebuffer,Renderbuffer}
   
   Fixes:
   * WebGLUniform location shouldn't inherit from WebGLObject.
   
   Known Issues:
   * WebGL objects have to be destroyed on drop, we may want to keep a reference to the context, or maybe a clone of the renderer to achieve this
   
   Also refactors a huge part of the current implementation, to allow
   failing on creation of different WebGL objects.
   
   Blocked on servo/gleam#22
   
   A reftest for most of the added functionality is not doable right now,
   we need a few more functions in order to upload a texture, for example.

   

   emilio committed Jun 6, 2015

   Loading status checks…
   9f94d39