Renaming size methods
Merge pull request #13 from chdemko/rename-size

Renaming size methods
Merge pull request #15 from JeanFrancoisViaud/master

Je me lance sur un plus gros commit cette fois. J'ai ajouté cette classe...
Add unit test on DAGraph class
Merge pull request #16 from chdemko/dagraph-test

Add unit test on DAGraph class