Updated documentation to mention Symbian port and the lack of Windows support
Updated documentation to mention Symbian port and the lack of Windows support

szastupov/ustl,dgruss/ustl,NoSuchProcess/ustl,uusirant/ustl-cmake,szastupov/ustl,uusirant/ustl-cmake,PetteriAimonen/ustl,Gerii/ustl,PetteriAimonen/ustl,PetteriAimonen/ustl,msharov/ustl,dgruss/ustl,msharov/ustl,Gerii/ustl,NoSuchProcess/ustl