minor #259 Replace Request with RequestStack in docs (bocharsky-bw)
minor #259 Replace Request with RequestStack in docs (bocharsky-bw)

This PR was merged into the 2.0.x-dev branch.

Discussion
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Replace Request with RequestStack in docs

Since Symfony 2.4 better to use [RequestStack](http://symfony.com/blog/new-in-symfony-2-4-the-request-stack) instead of Request.

Commits
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6996447 Replace Request with RequestStack

KnpLabs/KnpMenuBundle,javiereguiluz/KnpMenuBundle,stof/KnpMenuBundle,Soullivaneuh/KnpMenuBundle,Soullivaneuh/KnpMenuBundle,benji07/KnpMenuBundle,piotrantosik/KnpMenuBundle