Bug fixes and small enhancements

[2.1.3] - 2017-04-08

Enhancements

• Write acks now called with a failure message if connection is down by [@erik Karlsson](@erik Karlsson)
• Write acks now called with null if value hasn't changed by [@erik Karlsson](@erik Karlsson)
• Linting / Babel support
• Improved a few typescript bindings by @EnigmaCurry
• Changed heartbeat missed message to include time
• Setting anonymous record with same name no longer discards and resubscribes the record

Bug Fixes

• Invalid remote wins merge conflicts
• Prevent records from being set with scalar values by @datasage
• Prevent bad login message from constantly attempting to reconnect by @datasage
• RecordHandler invalid destroy state emitted an error instead of using client._$onError