Merge pull request awslabs#54 from dandalf/master

v 1.5.1 fix silent error on subsequent invocations

Merge pull request awslabs#10 from tomsmaddox/master

Fixed some unexpected behavior when default delivery streams are disabled

Bug fix for events with no records

Merge pull request awslabs#8 from tomsmaddox/master

Configurable stream sources

Deprecating 1.1.0