international is dependent on the nav field
removed nav_international
Merge pull request #136 from wasade/issue_122

international is dependent on the nav field
Merge branch 'master' of https://github.com/biocore/american-gut-web into issue-61
Merge branch 'master' of https://github.com/biocore/american-gut-web into issue-61
Merge branch 'issue-61' of https://github.com/josenavas/american-gut-web into issue-61