Stub in compaction.
Apparently these can be left out.
Languages can be equated at the tag level.
Delays can be forced more conveniently.
Another form of equality for delays.
Compact alternations with Empty.
Compact concatenations with Empty.
Compact repetitions of Empty.
Add function composition.
Underscore-prefix the tests.
Document repetition compaction.
Cannot currently compose reductions because the types don‘t line up.
Merge pull request #4 from robrix/compaction

Compaction