Fix example and add a hint

Fix the first example and add a hint about where to get the token from. The webhook_uri support still isn't working right, but this should be a decent work around for anyone trying to use this module for now.
streams/sdo: Special case for 0 and 1 arg versions

This changes sdo to have special cases for 0 and 1 args, calling
bit-bucket in the 0-arg case, and the child directly in the second case.

Fixes #398.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
Add OpenTSDB server support

Consume OpenTSDB datapoints and convert them into Riemann events.

This work was mostly based on `riemann.transport.graphite`, as the
concept is very similar.
Merge pull request #465 from iggy/patch-1

Fix example and add a hint
Merge pull request #469 from algernon/f/sdo-special-cases

streams/sdo: Special case for 0 and 1 arg versions
Merge pull request #470 from pharaujo/opentsdb_server

Add OpenTSDB server support