Merge branch '1.x'

Merge pull request FriendsOfSymfony#215 from vadim2404/fix_routing_de…

…precation

Fix deprecation notice at routing.xml

Marked HHVM as officially supported

Fixed the debug command for Symfony 2.4+

This backports the fixes done by @ClementGautier in the 2.0 version of
the bundle.
Closes FriendsOfSymfony#127

Fix router.js

[doc] fix typo

Merge pull request FriendsOfSymfony#111 from apfelbox/route-cache-only

Only cache routes in the Config Cache

Add Sf2 2.3 and 2.4 to travis-ci config

Merge pull request FriendsOfSymfony#107 from FriendsOfSymfony/use-jso…

…np-callback-validator

Use JsonCallbackValidator lib

Merge pull request FriendsOfSymfony#104 from FriendsOfSymfony/callbac…

…k-validator

Callback validator