v0.0.18: [bugfix] Silenced should be false for the alerts API
* Force dry-run alerts to be silent to prevent false alerts * Use the unmute_monitor API call to unmute silenced alerts. The update_alerts API call will not unmute even when setting silenced to false or null. * Fix for timeout calculation * Support aliases in the filesystem group_sources. This will enable groups to have alises during renaming. * Require nokogiri to < 1.7.0 for Ruby 1.9.3 * Bump to 0.0.18