spec test for input/file
initial spec test for output/file
Mimic filterworker in test_util for filters that need to create events (split/clone)
Simplify multiple_events logic
spec test for filter/split
initial spec for filter/clone
event_v0#clone was not deep-ish, discovered with clone filter tests
Merge pull request #479 from wiibaa/test-test-test

Test test test