don't exit on uncaught exception

bookrc.js

@@ -6,8 +6,7 @@ log.use(require('book-git')(__dirname));
 log.use(require('book-raven')(process.env.SENTRY_DSN));
 
 process.on('uncaughtException', function(err) {
-    log.panic(err);
-    setTimeout(process.exit.bind(process, 1), 2000);
+    log.error(err);
 });
 
 module.exports = log;