ray scaffolding-adding details

Conflicts:
	genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/operator/scaffolding/RayScaffoldingMessage.java
	genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/operator/scaffolding/RayVertex.java
	genomix/genomix-pregelix/src/main/java/edu/uci/ics/genomix/pregelix/operator/scaffolding/ScaffoldingVertexValueWritable.java
added RAY_SCAFFOLD to pipeline
Added Read and Write- Error free - Not working
Merge pull request #82 from uci-cbcl/elmira/implementing-ray

Elmira/implementing ray