Migration to silex 1.1
minor #53 Migration to silex 1.1 (Trismegiste)

This PR was squashed before being merged into the master branch (closes #53).

Discussion
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Migration to silex 1.1

Hello,

I've migrated many components used in this edition, including Silex to 1.1 release.

PHPUnit are ok.

Hope this helps.

Commits
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fffa4e6 Migration to silex 1.1