Fix #69: Introduce WindowSettings to decouple Window from SystemWindow

This also fixes a possible race while creating new system windows from
different threads as they modify the parent eq::Window directly.
Merge branch 'master' of https://github.com/tribal-tec/Equalizer into windowsettings
Remove old configTool
CR #301
Fixes after CR #301
Merge branch 'master' of https://github.com/Eyescale/Equalizer

Conflicts:
	eq/server/config/display.cpp
Merge branch 'master' into windowsettings
CR
Fix Win32 build
Partial OS X windowsettings impl
Fix non-magellan build
Merge branch 'master' of https://github.com/tribal-tec/Equalizer

Conflicts:
	eq/client/agl/windowSystem.cpp
	eq/server/config/display.cpp