Alpha release

This release introduces debug messages and built-in timeout support.

Not tested on actual hardware - please report any issues.

API is backwards-compatible, but warnings will appear if the old constructor is used. To avoid them make a simple change:

# Change this:
api = Copernicus(my_conn)
# into this:
api = Copernicus(connection=my_conn)

Initial release

This release appears to be usable, but I don't declare it stable yet.