Remove nationality from Constituent resource

We decided to remove the nationality from constituents because it's too
touchy. The field should be removed from the table later, but that can
happen at any time as long as the field isn't made part of the resource.
Merge branch 'remove-nationality' into develop
Fix trailing slashes in generated URLs

Some URLs were being generated with extra trailing URLs when there was
no object id.
Merge branch 'fix-trailing-slashes-before-query-parameters' into develop
Bumped version number to 1.0
Merge branch 'release-1.0'