This is a maintenance release to address some compatibility issues with 1.4. While an upgrade is not required it may help in diagnosing issues related to the CORS changes made in the Elasticsearch 1.4 Beta 1 release.

• Adds a "connection failed" screen with trouble shooting tips to mitigate Elasticsearch 1.4 CORS changes
• Adds ignore_unavailable to maintain ongoing compatibility in light of of ignore_missing deprecation