Xtu Code

Moved the SigOpBatchSize parameter of the default scheduler to be a runtime settinf as opposed to a comptime setting. This makes more sense. As a results, chnaged the name of DefaultSchedulerT to DefaultScheduler (no T) since it's not a template anylonger. Also fixed test 35 that executed unecessary slow which had a bad impact on Valgrind profiling execution time.