updates for sensu 0.11+
changes per feedback
typo
add empty static tag array in the datadog config
Update datadog handler
 - Convert to class extending Sensu::Handler
 - Change message title to only include the check name, not the hostname
 - Add aggregation key based on message title
 - Set event source as nagios so that events can be claimed and weekly reports run
 - Allow static tags to be set in configuration
 - Add dynamic tags based on subscribers in the event
 - Set priority based on event status
Merge pull request #339 from kcrayon/master

updates for sensu 0.11+
Change permissions on ruby scripts from 644 to 755
fix rubocop failures
Merge pull request #342 from janstenpickle/datadog_events

Datadog events
Merge pull request #343 from mrichar1/master

Change permissions on ruby scripts from 644 to 755