Send ints as Timing

[oskarwojciski]

Statsd timing can be used for not only measuring time, but also other statistical values where you need automatically calculated count, mean, sum, upper etc.
I have added such function in my fork, where you can pass int instead of time.Duration and it is not divided from nanoseconds to milliseconds:

oskarwojciski@e0e201f

If you think it can be useful for anybody else, then I can update Readme.md and do Pull Request.