Merge pull request +7895 from c9/tmux2

fix +7764 Runners do not work with tmux 2.0

node_modules/vfs-local/localfs.js

@@ -1923,7 +1923,7 @@ module.exports = function setup(fsOptions) {
                                 meta.pty.emit("data", err);
                             }
                             
-                            else if (data.indexOf("Set option") > -1) {
+                            else if (data) {
                                 // Fetch the PID if appropriate
                                 if (options.detach && options.output) {
                                     fetchPid(function(err, pid){