Renaming graph vertex "names" attribute to "name", in line with igraph and other singular attrib names
Adding support for examples in "tractor -o" output
Adding graph-reweight script
Adding a "-k" flag to tractor_Rinstall to allow installs to fail gracefully
Adding (optional but recommended) igraph package
Adding .gitignore for igraph, and removing config.h from index (since it is autogenerated)
Updating reportr
Updating reportr
Adding graph-props script