new file: mcgp.rb
add option for graph-partitioning
use input file nodes as graph vertex
new class: RankCounter
modify condition in postprocess
use task.location.empty?, modify gfrep
delete debug msg
new method: priority
modify: PriorityHrfQueueArray and LifoHrfQueueArray, new module: HrfQueue, new class: PriorityHrfQueueArray
v0.9.9.1