Version 0.2.0 Changes: * default metrics endpoint changed from '/metrics.json' to '/metrics' Features: * added support for summaries (formerly known as histograms) * fully compatible with Prometheus JSON API v0.0.2 * improved tracing of HTTP requests of the Collector middleware * enhanced test suite and exmample application Full changeset: https://github.com/prometheus/client_ruby/compare/v0.1.0...v0.2.0