libgamma-intl
	An extension with support for text description
	of constants and internationalisation.


Unsupported display servers:
	GNU Hurd TTY   Does it have gamma ramp support?
	The BSD TTY:s  Do they have gamma ramp support?
	Haiku          Haiku does not have gamma ramp support
	Wayland        I do not think Wayland have gamma ramp support
	Mir            I do not think Mir have gamma ramp support


Adjustments in Quartz are reverted when the process exits,
this information must be available in the method capabilities.

Gamma ramp support test should return yes, no or maybe.

Add hotplug support.