Shibainu

Store the coordiantes(lon/lat) of the center of the scaled primary buffer, and use it in `drawPrimaryScreen`

1

Now it works with greatly enhanced robustness, panning around immediately after a zoom-in/ zoom-out will not result in striange unalignment.

Under the directory `test/graphviz`, the original base_* version .ps files are seemingly identical to those generated during the execution of gtest, which are prefixed by `test_`. But their filesizes are...

I've spent a whole afternoon try compiling these code under Ubuntu 20, with g++ and gcc default to g++-9 and gcc-9, respectively. And following the instructions, I use miniconda to...