Merge pull request jupp0r#108 from jupp0r/bugfix/fix-compile-error-wi… …th-gcc-7 Fix GCC 7 compile error

Merge pull request jupp0r#105 from jupp0r/replace-protobuf Remove protobuf dependency This change removes the protobuf wire format, as it's no longer supported in prometheus 2.0. It uses this as an opportunity to remove protobuf as an external dependency all together, which will make integration into existing code bases that already use protobuf much more palatable.

Merge pull request jupp0r#93 from jupp0r/feature/remove-json-output Remove JSON Serializer

Merge pull request jupp0r#80 from khabinov/khabinov/fix-histogram-bou… …ndaries Histogram boundary value should be inclusive

Merge pull request jupp0r#64 from jupp0r/feature/fix-benchmark-counte… …r-naming Fix benchmark metrics naming

Merge pull request jupp0r#63 from jupp0r/feature/reduce-scraping-threads Reduce number of threads for scrape server

Merge pull request jupp0r#61 from JShabtai/feature/configurable-uri Made the exposer URI configurable

Merge pull request jupp0r#54 from jupp0r/feature/add-histogram-family… …-test Add histogram family unit test

Merge pull request jupp0r#44 from jupp0r/feature/cumulative-histograms Make histograms cumulative

Merge pull request jupp0r#39 from gjasny/fix-type-mismatches Build fixes for various platforms