mv graph element under graph
add @in_edges and @out_edges on vertex with vertex_test
Merge pull request #5 from rgraphum/divide-in-out

Divide in out
git add fixs
Merge branch 'master' into divide-in-out
Merge pull request #6 from rgraphum/divide-in-out

git add fixs
Merge branch 'master' of git://github.com/rgraphum/rgraphum