add graphite-wildcards check - can return multiple targets based on a wildcard
Fixes for CI failures
Merge pull request #252 from simonjohansson/master

New metrics for disk usage.
Fix has_been_updated_since warnings
Added option to display warning messages along side critical messages in alert text
merge graphite-wildcards with original graphite check
remove trailing whitespace
Merge pull request #253 from janstenpickle/master

Clone of graphite check with the ability to specify wildcard targets