minor #2387 Make documentation more user friendly (Holicz)
minor #2387 Make documentation more user friendly (Holicz)

This PR was submitted for the master branch but it was merged into the 1.x branch instead (closes #2387).

Discussion
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Make documentation more user friendly

Add neccesary use statement as it uses an alias and it's not possible to do fast import of class with PHPStorm
Add information, that the controller must be in a routing (#2025 should not happen again)

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Commits
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d0afd8a2 Make documentation more user friendly

javiereguiluz/EasyAdminBundle,OskarStark/EasyAdminBundle,javiereguiluz/EasyAdminBundle,yceruto/EasyAdminBundle,OskarStark/EasyAdminBundle,yceruto/EasyAdminBundle,yceruto/EasyAdminBundle,OskarStark/EasyAdminBundle