Uploading latest version of Vertex and Arc list
Removing Arc and Vertex list (no longer necessaries - we can simply use standard templates)
Adding cost in the Arc properties of flow
Removing Digraph (no longer necessaries - we can directly use Adjacency list)
Requiring explicit initialization of vertex
Requiring explicit initialization of arc
Rebuilding generators to work with default templates as arc and vertex lists. Adding out and in arcs iterators
Updating library include
Updating example