computePerfStats more flexible, can now accept a combination of graph options
computePerfStats more flexible, can now accept a combination of graph options

see comments in computePerfStats or format of ./test/studies/shootout/chameneos-redux/chameneos-redux.graph
for more details


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@17430 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

CoryMcCartan/chapel,chizarlicious/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,hildeth/chapel,sungeunchoi/chapel,chizarlicious/chapel,hildeth/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,chizarlicious/chapel,hildeth/chapel,hildeth/chapel,sungeunchoi/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,hildeth/chapel,CoryMcCartan/chapel,chizarlicious/chapel,hildeth/chapel,chizarlicious/chapel,hildeth/chapel,CoryMcCartan/chapel