New self-explanatory name

[beniamin]

Hello,
I think that this library should be renamed in something more explicit. guzzle-middleware is to generic and misleading.
I am thinking that guzzle-statsd-exporter or guzzle-stats-profiler would better explain what this library does and how should be used.

What do you think?

[mihaileu]

@alexandrupetcu what do you say ?

[alexandrupetcu]

Yes, I agree. We can change the name.