add AutoPrereqs to make sure dependencies are listed
minor documentations updates
update Changelog
remove CheckChangelog
initial version fixed in dist.ini
fixed NextRelease
Support for deletion of edges, with tests.

It's now possible to remove an edge from directed and undirected graphs.
better gitignore file
fix a perlcritic violation for grep syntax
fix typo in grep syntax
fix typo in POD method name for delete_edge