Revert "fixed duplicate edges in graph display; added ID to composite nodes"
Revert "fixed duplicate edges in graph display; added ID to composite nodes"

This reverts commit 1c66f6f294b9089b1027a18801cc5883921488c4.

anqilu/dispel4py,aspinuso/dispel4py,dispel4py/dispel4py,aspinuso/dispel4py,akrause2014/dispel4py,aspinuso/dispel4py,dispel4py/dispel4py,anqilu/dispel4py,akrause2014/dispel4py