Do not mangle RootbeerGpu.threadfenceSystem()
Merge branch 'master' of git://github.com/pcpratts/rootbeer1 into merge
Update StringBuilderRunOnGpu4 test case
Merge pull request #151 from millecker/merge

Do not mangle RootbeerGpu.threadfenceSystem()
Merge pull request #159 from millecker/merge2

Update StringBuilderRunOnGpu4 test case
StringBuilderTest4 passes