* Add finer-grained measurements to the million_timers benchmark.
Before this commit it only measured the total running time.
* Bump the number of inserted timers from 1M to 10M. With one million
timers, it finishes too quickly to get useful profiling data out of
it with perf or oprofile. The name of the benchmark is now a lie but
such is life.
This changes the prototype of uv_run() from:
int uv_run(uv_loop_t* loop);
To:
int uv_run(uv_loop_t* loop, uv_run_mode mode);
Where `mode` is UV_RUN_DEFAULT, UV_RUN_ONCE or UV_RUN_NOWAIT.
Fixes#683.
