Adding support to different token providers, including AWS Secrets Ma…

…nager

Removing unused token from Configuration, adding support to webhooks,…

… and improving incident handling by letting customize the incident message.

Fixing numerous bugs, including scheduling issues, incorrect document…

…ation about latency unit, pushing metrics twice. Thanks @nijel for all the fixes.

Fixing bug that was preventing the status to be updated

Fixing bug in scheduler.py mtakaki#81

Fixing bug when pushing status

Upgrading dependencies and fixing coveralls

Adding client to automatically scrape configuration

Adding expectation validation mtakaki#21 - Fixed by mtakaki#77

Release 0.6.0. Added support to multiple URLs.