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.
Remove old configTool
CR #301
Fixes after CR #301
CR
Fix Win32 build
Partial OS X windowsettings impl
Fix agl setup: (fullscreen != ON) != fullscreen) (#301)
Merge branch 'master' of https://github.com/Eyescale/Equalizer