Fix invalid call to rcvmore(), it seems to now be an attribute instead.
Refactor magic into separate lib and magic file, start a real test suite.
Clean up the setup part, hold the PyObject in main Julia interpreter.
Add basic numpy test.
Clean up and leave ready for testing the simpler kernel/frontend pair.
Clean up notebooks, add proper README.md.

Right now there's a strange bug in kernel mode, where only the first
character of the input comes back.  But in local import mode it works
perfectly.  I'm stumped, but the code is now cleaner and ready for
further debugging on the list.
Move over readmes to markdown.