#258 Gerbv routing command support

[Tarun Johar]

Gerbv currently does not support G00/G01 routing commands: https://sourceforge.net/p/gerbv/patches/56/

If it's fairly straight forward fix, that we have implemented and can be updated using patch that is attached. (See attached gerbv-slot-support.patch)

Instructions for building with the attached patch:

git clone --depth 1 git://git.geda-project.org/gerbv/
cd gerbv
patch -p1 -i /path/to/patchfile
./autogen.sh
./configure --enable-shared=no --prefix=/opt/gerbv
make -j8
make install

We have verified that this patch also applies against the v2.7 branch so an incremental release would be possible.

get clone --depth 1 -b gerbv-2-7 git://git.geda-project.org/gerbv/

Can you please merge the attached patch into the next release ? It applies cleanly on v2.7 and master branches. It was tested on slots generated by KiCad 5.1.7.

[Tarun Johar]

The patch shared is based on the code from this link: https://sourceforge.net/p/gerbv/patches/56/#128b