Catch up with ISO name change for Cabo Verde.

First seen in deactivated/python-iso3166
commit ac7c6cd297ae83659092b2e1f63713683c1fb0f4.
Merge pull request #6 from hannosch/iso3166-update

Catch up with ISO name change for Cabo Verde.
Changed mcc API to always return a list, closes #4.

I changed one readme example from mcc 310 to 311, as 310 returns three
countries (Bermuda), which I found slightly less readable. Showing a two
country example already highlights the main point.
Declare and let travis test Python 3.3 compatibility.

Python 3.2 is currently not supported, as we are using the u-prefix,
which was re-introduced in Python 3.3.
Merge pull request #8 from hannosch/declare-python-3-compat

Declare and let travis test Python 3.3 compatibility.
Merge pull request #7 from hannosch/multiple-countries-per-mcc

Changed mcc API to always return a list, closes #4.
Reformatted changelog

This makes github's renderer happy and avoids bold/italics.