[fix] Prevented Errbit from generating errs recursively when failing to notify of an error with itself (1h)
[improvement] Improved the fingerprinting algorithm for errs to reduce the number of duplicate reports (1.5h)
[skip] Used Ruby 1.9-style hashes (4m)
[skip] Normalized syntax for lambdas and blocks (10m)
[refactor] Rewrote the ProblemMerge spec (5m)
[fix] Set rules for what values `opened_at` and `resolved` should have when merging problems with mixed values (30m)