Add basic error handling

lib/api.js

@@ -54,6 +54,11 @@ var API = module.exports = function API(opts) {
 
   // load route definitions
   this.express.use('/api', require('./api/routes'));
+
+  // error handling
+  this.express.use(function(err, req, res, next) {
+    res.json(500, { error: err.message || "An error occured."})
+  });
 };
 
 API.prototype.defaults = {