Allow tests to pass when STATIC_URL of a Django project is not '/static-assets/'
allow indexing and slicing
added "COUNTRIES_INCLUDE" to restrict list of countries.
removed unnecessary statement
renamed COUNTRIES_INCLUDE to COUNTRIES_ONLY
renamed test name
Translations: add Esperanto and update French and Spanish
Merge pull request #54 from variable/fix-issue-#49

Added "COUNTRIES_ONLY" setting to restrict list of countries.

Fixes #49
Merge pull request #53 from anentropic/countries-getitem

Allow indexing and slicing of `Countries` object
Merge pull request #46 from mathspace/master

Allow tests to pass when STATIC_URL of a Django project is not '/static-assets/'
Tidy up how COUNTRIES_ONLY works
Ensure country names are translated before sorting to avoid excessive calls to ugettext

Refs #41
Update Spanish translation
Add Farsi translation
Fix test for override_only
Don't return a Country object for a null or empty string

Fixes #47
Update ISO name for Cape Verde (Cabo Verde)
Update Libya flag
Add European Union flag

No, it's not an ISO country but it's in the exceptional reservation list and is a common one people may want.
Refs #45
Update Burma flag