[#678] Added IATI folder and updated references
[#678] New codelist generator and generated codelist versions
[#678] IATI fields added to models
[#678] Rename date_request_posted and date_complete
[#678] Update migration and convert all codelists to strings
[#678] Added IATI fields to admin
[#678] Update admin based on project form
[#678] Updated dates in IATI scripts and API
[#678] Prettify country names in code list

Since we're starting to use the code lists in the admin I thought the
country names should look nice. And this paves the way for using the
country code list in the Country model too.
Merge branch 'feature/678_iati_fields' of github.com:akvo/akvo-rsr into feature/678_iati_fields
[#678] Updated Project API returning old date fields
Merge pull request #682 from akvo/feature/678_iati_fields

[#678] Add IATI fields