Add support for circular gradients, prepare shaders to allow setting center.

Add simple radial gradient support, fix lint warnings.

Allow configuring where colour stops occur.

Add support for colour stops, equally spaced.

10 stops should be generous!

Add angular linear gradient support!

Add basic support for linear gradients!

Test whether colour conversion is giving me the issues on certain JPGs, nope!

Implement background-size!

Fix coordinatespace for texture-pixel lookup.

Constrain textures to limited commonly-supported colourspaces.

Fix parsing of background-image, attempt to fix image rendering.

Build texturing infrastructure & implement background-color!

Commit missing Image module.

Build texturing infrastructure.

Parse background-color for image data.

Add support for background-clip & prepare for multilayered backgrounds!

Add shorthand property parsing.

Fix transformation matrix (should be fixed upstream, but that'd be breaking).

Fix colour output, add OpenGL cleanup.

Improve debuggability, correct rect shrinking.