styles: Replace noise image with a shader

FluidUi now has a nice noisy background.

Closes #112
client: Fix background gradient declaration
client: Render solid color and gradient background with noise

Use the new NoiseBackground to draw solid color and gradient
backgrounds.

Closes #113
Change FluidUi imports to Fluid.Ui
Bump Fluid.Ui imports to 1.0
client: Remove EffectVignette

We moved it into Fluid.Effects.
libhawaiicore: Change SOVERSION to reflect the status
client: Change bug report URL
Rename hawaii-desktop-shell to hawaii-shell-client

There will be only one client loading different kind of UX.