Amend index to include live field
Merge branch 'master' of github.com:scobal/seyren
Specify Mongo version once
Tidy up some warnings
Prevent state and last updated date update from overwriting actual changes to the rest of the check
Update Mongo driver
Fix for checks with long targets not being able to save alerts

As of Mongo 2.6 there is a strictly-enforced 1024 byte length restriction on index keys. Our checkId + target can go above this given a sufficiently large target.