Talisker

-------------------

A collection of minor improvements and fixes, and relicensing to Apache 2.

* Relicense to Apache-2 (258, 275) (thanks to Adam Collard)
* Aggregate prometheus metrics into one file on worker death. (281, 288)
* Wrapping logging and metrics code with try/except, so that we never fail (276)
* Fail more gracefully in the case where talisker has not been setup properly (264)
* Add support for TALISKER_REVISION_ID variable (262) (thanks to Robin Winslow and Adam Collard)
* Return sentry id from capture (261)
* Set level=warning in soft req. timeout sentry messages (255) (thanks to Guillermo Gonzalez)

-------------------

* Fix X-Request-Id to be a native string on py2 (247)

-------------------

* only set prometheus envvar in gunicorn runner, not for all runners (242)

-------------------

* Fix a regression that broke prometheus metrics in multiprocess environments.

-------------------

* Change default slow query threshold to -1 even in DEVEL (226)
* Move the clearing of various request contexts as late as possible (233)
* add soft request timeout support (231) - thanks to Guillermo Gonzalez
* support raven 6.9.0 (232) - thanks to Guillermo Gonzalez

------------------

This release collects a number of bugfixes

* Make parsing the postgres dsn more robust (224)
* Protect django middleware view introspection (220) (thanks to tomwardill)
* Ensure that configured sentry processors is a set (219) (thanks to tomwardill)
* Fix link escaping in objgraph page (217)