Looks like mmap refactor tries to call total on hash which is an error

v0.7.1 / 2017-05-24

- [BUGFIX] Add missing _bucket suffix to histogram metrics

v0.7.0

- [CHANGE] Rewrite Rack middlewares
  - Renamed middlewares to Prometheus::Middleware::*
  - Collector uses histogram instead of summary
  - Adjusted Collector metrics to adhere to our best practices
  - Reduced Collector label cardinality by default
  - See prometheus#32
- [FEATURE] Add support for pushgateway deletes
- [FEATURE] Allow pushing metrics via TLS
- [ENHANCEMENT] Improve example application and docs
- [ENHANCEMENT] Remove extra Proc allocation from metrics sync
- [BUGFIX] Handle setting a gauge value to nil
- [BUGFIX] Validate metric name format

v0.6.0

- [CHANGE] Remove redundant `http_request_duration_total_seconds` metric from rack collector
- [FEATURE] Add histogram support
- [ENHANCEMENT] Rename Summary#add to Summary#observe. Summary#add usage is deprecated

v0.5.0

- [CHANGE] Adjust default HTTP metric names
  `http_request_durations_microseconds` to `http_request_duration_seconds`
- [CHANGE] Remove deprecated JSON exposition format
- [CHANGE] Remove deprecated Counter#decrement
- [ENHANCEMENT] Document recommended usage of gzip middleware
- [ENHANCEMENT] Add host to labels of default HTTP metrics

Version 0.4.2

Version 0.4.1

Fixes:

* Reflect latest add/replace semantic changes

Version 0.4.0

Changes:

* replaced Push#push with Push#add and Push#replace

Version 0.3.1

Fixes:

* Content-Negotiation fallbacks to JSON format for empty or '*/*' Accept header