Switch to manual statsd message parsing.
Swapped return values.

Applied Rob Miller's remarks about return value order in #44
Updated Changelog regarding #44
Issue #453 Faster double to string conversion
Issue #455 Make the max sandbox process message duration configurable
Fix TcpInput stream parsing.

Each connection requires its own stream parser since they run in parallel.
Merge pull request #457 from mozilla-services/tcpinput-parser

Fix TcpInput stream parsing.
* added test and code to capture the problem of golang decoding JSON to a nil object, but not setting the error code.
* better error handling of invalid input JSON data
Merge pull request #459 from mozilla-services/features/jsonpath_nil_data

resolves issue #458
Merge pull request #456 from mozilla-services/issue_455

Issue #455 Make the max sandbox process message duration configurable
Merge pull request #454 from mozilla-services/issue_453

Issue #453 Faster double to string conversion
Merge pull request #451 from jeromer/issue/44

Switch to manual statsd message parsing.
Merge branch 'dev' into features/new-dashboard
Formatting.
Keep track of sandbox list and write it out to sandboxes.json whenever
the report runs.
Merge branch 'features/new-dashboard' of github.com:mozilla-services/heka into features/new-dashboard