Set import type to "auto" unless explicitly set.

Author: pluma

lib/collection.js

@@ -164,7 +164,9 @@ extend(BaseCollection.prototype, {
       opts = undefined;
     }
     if (!callback) callback = noop;
-    this._api.post('import', data, extend({}, opts, {
+    this._api.post('import', data, extend({
+      type: 'auto'
+    }, opts, {
       collection: this.name
     }), function (err, body) {
       if (err) callback(err);