Add support for Graphite tag format

Merge pull request #20 from smira/19-wrong-address

Fix sendLoop not exiting when connection can't be established

Merge pull request #18 from smira/split-benchmarks

Split out benchmarks, initialize go.mod

Merge pull request #15 from filippog/float_counter

Add float counter methods

Merge pull request #13 from mailgun/maxim/develop

Add clone methods

Merge pull request #11 from mailgun/maxim/develop

Allow using any logger

Merge pull request #6 from smira/tag-support

Implement support for statsd tags

Merge pull request #5 from smira/codecov

Add codecov.io integration