Report last_flush and last_exception like other backends.
Show a simple current error state in status output.
Merge pull request #3 from fastestforward/fix-status-reporting

Standard backend status reporting
allow instrumental backend to support timing, set, and histogram data sent from the main statsd lib
use correct command form
don't clobber count values when calculating count rates
New endpoint collector.instrumentalapp.com.
Merge pull request #4 from netshade/support-more-types

Support more types, refactor protocol, and buffer stats for minimum 60s.
Merge pull request #5 from fastestforward/new-endpoint

New endpoint collector.instrumentalapp.com
Bump version