Updated routing.rst to clarify and expand it:
Split "Routing Definition" into two sub-sections and clarified what baseRouteName does and how all the action routes' names are generated
Listed the default routes defined by Sonata
Added note about how to see the current routes for an Admin (via the console)
Added note that removing a route stops Sonata from linking to that action
Added sub-headings to the "Removing a route" section
Cleaned up the "Default route in List Action" section
Tidied up and expanded the "Create a route" section
Merge remote-tracking branch 'remotes/upstream/master'
Stubs added for four new chapters relating to the different actions you can use SonataAdmin to manage
Moved links to reference at bottom of pages
Merge pull request #1553 from caponica/new-docs

New docs for actions