BUILD: add with-opengl-shaders
GRAPHICS: Create GfxOpenGLS driver
GRAPHICS: Render backgrounds [OpenGLS]
GRAPHICS: Smush movies [OpenGLS]
GRAPHICS: Implement text rendering [OpenGLS]
GRAPHICS: Rendering of EMI models [OpenGLS]
GRAPHICS: Draw sprites [OpenGLS]
GRAPHICS: Replace GL_QUADS by GL_TRIANGLES [OpenGLS]
GRIM: Refactor drawModelFace
GRAPHICS: CreateModel in GfxBase
GRIM: Draw background [OpenGLS]
GRIM: Start of drawing actors [OpenGLS]
GRAPHICS: Abstract shader compilation and VAOs
GRAPHICS: Add Graphics::Framebuffer for deferred rendering
GRAPHICS: Make renderer compile with ES2
GRAPHICS: Get rid of VAO usage [OpenGLS]
GRAPHICS: Make shaders compatible with GLES2
GRAPHICS: Drastically simplify smush drawing
GRAPHICS: Build in compat and box shaders
GRAPHICS: Use uint32 instead of uint32_t