Addressing issue in Graph creation where a graph created with a vertex set that does not span all of the vertices in the edges will crash on triplet construction.
Fixing documentation
During graph creation, create eTable earlier
Merge pull request #1 from ankurdave/MissingVertices

During graph creation, create eTable earlier
Merge pull request #69 from jegonzal/MissingVertices

Addressing issue in Graph creation