Generic Mapping Tools

Some notes on where I contributed to the development:

• Feature request Angled crosslines in grdtrack
• Feature request Oblique annotations in `gmt colorbar`

• Split a multisegment file into one file per segment using gmtsplit: gmt split <infile.gmt> -Doutfilebasename_%d.gmt - This will create as many output files named outfilebasename_00n.gmt as there are segments in the input multisegment file infile.gmt

• https://github.com/conda-forge/gmt-feedstock/pull/15