0.0.3: Merge pull request #6 from cloudflare/dont_output_error

Release to include: #6

Allow OpenTSDB URL to be set at scrape time

Instead of setting the OpenTSDB URL as a command-line argument, allow it
to be set using the target parameter at scrape time.

This change makes it possible to specify OpenTSDB targets using
Prometheus' service discovery in combination with relabelling, which is
important when you have multiple tsd instances.

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Scrape configuration will need updating accordingly.

Initial release

Merge pull request #2 from cloudflare/change_port

Use port 9250