Rotate a vector around another point.
CL_Vec2<Type>& CL_Vec2< Type >::rotate( const CL_Vec2 < Type > & hotspot, const CL_Angle & angle); static CL_Vec2<Type> CL_Vec2< Type >::rotate( const CL_Vec2 < Type > & vector, const CL_Vec2 < Type > & hotspot, const CL_Angle & angle);