Fix some issues with page admin & preview
Merge pull request #418 from prashantpalikhe/homepage

Navigation Menu And Footer
Merge remote-tracking branch 'upstream/master'
First project search form
style search form
Filter countries on oda
Project search object in Em first filtering in Dja
style project search items
More project preview styling & search
Merge pull request #419 from gannetson/project-search

Project search
Properly set the project field on the VoucherDonationSerializer.
Make a base exception for cowry.
PEP8
Change from using /api/payments/current to /api/payment/<id>.

This commit also includes a cleanup of the payment tests.
Merge pull request #420 from benkonrath/payment-api

Payment api
Update to Django REST Framework 2.3.6.
Merge pull request #421 from benkonrath/update-to-drf-2.3.6

Update to Django REST Framework 2.3.6.
Redo homepage api. One call will do now.
Don't break homepage on missing content.
Merge pull request #422 from gannetson/home-improvement

Redo homepage api. One call will do now.