Add a working parfib benchmark and some initial numbers for chaselev
chaselev: Additional optimization and parfib timing
Add a rough draft of Int sized CAS for byte arrays and unboxed counters based on them
Switch chaselev over to Unboxed counter.  Some perf improvement.  Add extra inlining.  Still a problem with worker threads finishing too soon on parfib.
Add fetchAdd and more tests.  Debug allocation in increment loops.