Proper format for South African addresses

- Added a list of South African provinces as per ISO 3166-2:ZA.
- Changed the label "States" to "Provinces" and moved it to be the last item in the form.

As stated in #1219658: GB Specific Changes, this type of solution can become hard to maintain but we need this to support South African provinces.

I needed to follow the UK example more closely, so here's a new patch that does not put the locality fields directly next to each other.

Patch works correctly, thanks!

Updated the patch from #2 to be compatible with the latest version.
Also added '#render_option_value' => TRUE, to the Provinces as we work with the full name and not the abbreviations

Tested this, and it works for me on addressfield 7.x-1.0-beta5. Thanks :-)

Fixed two wrong ISO codes:

'GT' => t('Gauteng'),
'NL' => t('KwaZulu-Natal'),

and committed the patch.

Hm, Google's dataset says that the states aren't actually used for mailing in South Africa, and
http://www.postoffice.co.za/questions/postofficequestions.html#Correct doesn't mention the state either.

Therefore, we should actually remove the state field?

Based on the official post office quote:

The mailing address must be clearly printed or written on the front of the envelope, left-aligned, starting with Ihe name of the addressee on the first line, the number and street address on the second line, the suburb on the third line, the name of the city on the fourth line, and the correct postal code on the last line.

I have reverted the patch.

It shows that the correct tweaks to apply are
- Hide the administrative area field
- Add the suburb (dependent_locality) field.
- Make sure the ordering is correct.

EDIT: A recent commit has resulted in the administrative area being correctly hidden for South Africa.

The suburb field now shows up, the ordering is correct.