Window Color Inverter
Assign to a hotkey: toggle window color inversion.

Mostly stripped right out of the examples.
Added compton and dbus checks
Window Color Inverter
cleanup, speedup
Window Opacifier
This is a theorectical opacity control, which would allow users to
make the focused window more or less transparent. Similar to compiz's
Opacity, Brightness, and Saturation (opacify) plugin.
When assigned to mouse scrolling buttons and a modifier key, this
makes for a handy multitasking feature.

Opacity control is not yet available in compton's DBus specification.