Parse the slack url. Reject invalid urls.
Merge pull request #79 from librato/fix/slack-uri

Parse the slack url. Reject invalid urls.
Version bump to 2.20.0
Regenerate gemspec for version 2.20.0
Error if url is blank, not just non-nil
Version bump to 2.21.0
Regenerate gemspec for version 2.21.0
Clearing for the Slack integration
Merge pull request #80 from librato/feature/slack-clearing

Clearing for the Slack integration
Version bump to 2.22.0
Regenerate gemspec for version 2.22.0
Support different types of clearing
Merge pull request #81 from librato/feature/clears

Support different types of clearing
Slack service distinguishes amongst the different types of clears
Version bump to 2.23.0
Regenerate gemspec for version 2.23.0
Disable opsgenie clearing support for now
Version bump to 2.24.0
Regenerate gemspec for version 2.24.0
Merge branch 'master' into victorops