Moved RoutingAuto to a directory
Rewrote introduction
Split introduction in seperate articles
Rewrote providers article
Rewrote actions
Rewrote customization
fixes
Updated images
[#361] Update routing_auto.rst

Fixed some copy-pasting gone wrong in the last configuration example. Also
made the service naming consistent between the last two examples, and made
the "services:" context visible for the YAML examples. :)
Further improved f2401a7
Merge pull request #353 from symfony-cmf/routing_auto_fixes

Routing auto rewrite