added eigen align operator to frame_handler_mono.h and point.h

It seems to be enough to add the EIGEN_MAKE_ALIGNED_OPERATOR_NEW to the files you suggested in the issue 11 (https://github.com/uzh-rpg/rpg_svo/issues/11). I see you already added it to SparseImgAlign, but it is also needed in FrameHandlerMono.h and Point.h