remove ray dependence on old scaffolding aggregator
bugfix for P4: newEdge unused and outgoingMsg not properly reset for updates
Merge remote-tracking branch 'origin/genomix/fullstack_genomix' into wbiesing/bugfix-for-p4

Conflicts:
	genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/operator/scaffolding/RayVertex.java
Merge pull request #85 from uci-cbcl/wbiesing/bugfix-for-p4

Wbiesing/bugfix for p4