Three main upgrades:
-Converted localGraphTargets into HashMap
-Disconnected nodes vote to halt on superstep 0
-Send messages from 0 to 1 only to connected vertices with link type 1

To be run if the hash improves time, and if results remain the same.
Also added several TODOs, most of them related with growablememories becoming hashmaps
VertexData.testCandidates turned into a HashMap
Trying to fix bug...
Merge branch 'master' of https://github.com/dariogarcia/ScaleGraphLP

Conflicts:
	LP_INF_local_recursive.x10
Merge branch 'master' into last_working