ExometerDatadog v0.4.1

Added httpoison to the applications list, to ensure it's started before we are.

ExometerDatadog v0.4.0

Added support for loading config from environment variables.

ExometerDatadog v0.3.0

• Library is now a lot more forgiving on startup if config keys are missing. It just doesn't start things, rather than trying to and crashing.
• The "host" setting now defaults to the current hostname, and can be overridden using functions as well as hard coding a name.

ExometerDatadog v0.2.0

• Expanded the library to include more than just a reporter. It's now an OTP application that will:
  • Automatically register the reporter with exometer
  • Optionally report system & vm metrics to datadog.
• Wrote a lot more documentation.

ExometerReportDatadog v0.1.0

The initial release, with a working datadog API reporter.

This release will not be on hex.pm as I've got a lot more work to do
(including potentially renaming the project). That will come later.