This change introduces a new component - ColorManager that is
responsible for color management stuff.
At the moment, it's very naive. It is useful only for updating gamma
ramps. But in the future, it will be extended with more CMS-related
features.
The ColorManager depends on lcms2 library. This is an optional
dependency. If lcms2 is not installed, the color manager won't be built.
This also fixes the issue where colord and nightcolor overwrite each
other's gamma ramps. With this change, the ColorManager will resolve the
conflict between two.
This change introduces basic colord integration in wayland session. It
is implemented as a binary plugin.
If an output is connected, the plugin will create the corresponding
colord device using the D-Bus API and start monitoring the device for
changes.
When a colord devices changes, the plugin will read the VCGT tag of the
current ICC color profile and apply it.
