Added Metacity Images
Merge https://github.com/cldx/numix-gtk-theme

Conflicts:
	svg-sources/gtk-3.0/assets/checkbox-checked-insensitive.svg
	svg-sources/gtk-3.0/assets/checkbox-checked.svg
	svg-sources/gtk-3.0/assets/checkbox-mixed-insensitive.svg
	svg-sources/gtk-3.0/assets/checkbox-mixed.svg
	svg-sources/gtk-3.0/assets/checkbox-unchecked.svg
	svg-sources/gtk-3.0/assets/menuitem-radio-checked-hover.svg
	svg-sources/gtk-3.0/assets/menuitem-radio-checked-insensitive.svg
	svg-sources/gtk-3.0/assets/menuitem-radio-checked.svg
	svg-sources/gtk-3.0/assets/radio-mixed.svg
	svg-sources/gtk-3.0/assets/radio-selected-insensitive.svg
	svg-sources/gtk-3.0/assets/radio-selected.svg
	svg-sources/gtk-3.0/assets/radio-unselected.svg
svg-sources moved to resources