Use constants module.
0.1.12
Assert on continuous array packets.

Breaks multi dimensional arrays.
Emit reply for continuous top-level arrays.

Such that when a received buffer contains an array followed by another
array the reply event is emitted for each top-level array.
0.1.13
Improve emit logic.

Such that multiple incoming simple strings in the same buffer will
emit reply multiple times.
0.1.14
Reinstate test specs.

Restores 100% code coverage.
0.1.15