Changed all error handling to async-stacktrace style + fixed import/export on unix

node/handler/APIHandler.js

@@ -18,6 +18,7 @@
  * limitations under the License.
  */
 
+var ERR = require("async-stacktrace");
 var fs = require("fs");
 var api = require("../db/API");
 
@@ -122,7 +123,7 @@ exports.handle = function(functionName, fields, req, res)
     else
     {
       res.send({code: 2, message: "internal error", data: null});
-      throw (err);
+      ERR(err);
     }
   });