Set backbone to automatically set the CSRF header token for django for all ajax requests

Backbone.sync_csrftoken.js

var oldSync = Backbone.sync;
Backbone.sync = function(method, model, options){
    options.beforeSend = function(xhr){
        xhr.setRequestHeader('X-CSRFToken', CSRF_TOKEN);
    };
    return oldSync(method, model, options);
};