Well, this is an old typo -- actually enable one-time retries.
Add units to var name.
Allow retry delay to be configured.
Add a timeout option for all post requests, which is configurable.
Document posttimeoutSecs.
Always add a 'data' event handler to avoid timeout on 0.10. h/t
@priteau

Node versions 0.10 will put streams into a paused state forever if
there is no 'data' event-handler. [1]

[1] http://blog.nodejs.org/2012/12/20/streams2/
Merge pull request #13 from librato/feature/retry_timeouts

Feature/retry timeouts