Add get_and_reset_value overload for boost::uint64_t
Add RAII timing helper.
Add commented out code that explicitly spawns threads on the queue local to the
spawner.
Add performance counters that measure the % of time spent creating and cleaning
up threads.
Add CMake support for the new creation/cleanup counters.
Fix typo in CMakeLists.txt variable name.
Fix counter discovery issue with new cleanup/creation counters