Update librato-metrics dependency to version 1.0.3
Update delayed_job dependency to version 3.0.5
Update gherkin dependency to version 2.11.6
Update rack-ssl dependency to version 1.3.3
Patch YAML to allow only some Gem classes to be unmarshalled
Catch and report YAML exploit errors separately
Revert "Temporarily disable pushing"

This reverts commit 3fe95b2e24171f0325e023e08d5472c3977e7b2b.
Add a test for exploit preventative behaviour
No longer leak backtraces (issue #514).
Merge pull request #515 from postmodern/dont_leak_backtraces

No longer leak backtraces (issue #514).
YAML's scalar parsing yields numbers sometimes, which are erroneous but should be caught cleanly
Clarify whitelist of classes
Make sure preloaded tag coders are whitelisted too
Merge pull request #516 from sj26/whitelist-yaml

Whitelist YAML classes demarshalled from metadata Edit
Protect against symbol injection DoS attacks
Use environment variables to fill in the details of config/newrelic.yml
Merge pull request #522 from vertis/master

config/newrelic.yml license key in an environment variable
Fix NewRelic not getting any data
Merge pull request #523 from vertis/master

Fix NewRelic not getting data
Update mime-types dependency to version 1.20.1