Update jamo.py
Update jamo.py

Adds compound composition and decomposition to address the issue I filed in #36 (admittedly an issue you may or may not even want to resolve!)

Tried to follow your style and only make a few changes. You might prefer a different model for the constants though. Also catch my NOTE: at 326, I'm stretching your hcj_to_jamo model, which would only be an issue if you make that jamo "position" requirement more strict.

Take or leave, and thanks for the project!
JDongian/python-jamo