[Feature] Heroku add-on integration

[Feature] Published API libraries: Go, Node.js, PHP, Python, Ruby

[Improvement] Added support for multi-user Pingdom enterprise accounts

[Improvement] Updated developer API documentation

[Improvement] Handle both seconds and milliseconds for custom metrics API

[Improvement] Added new AWS region: ap-northeast-2 / Seoul

[Improvement] Disabled autocomplete for login view password field

[Improvement] Automatic trial expiring email notifications

[Bug] Fix issue with Internet Explorer and 408 errors

[Bug] Fix Frankfurt AWS region coordinates

[Bug] Fix subscriber/update API method to include ‘method’ variable