Update deps
Update deps

Changelogs summary:

 - symfony/polyfill-mbstring installed in version v1.0.0
   Release notes: https://github.com/symfony/polyfill-mbstring/releases/tag/v1.0.0

 - symfony/polyfill-util installed in version v1.0.0
   Release notes: https://github.com/symfony/polyfill-util/releases/tag/v1.0.0

 - paragonie/random_compat installed in version 1.1.1
   Release notes: https://github.com/paragonie/random_compat/releases/tag/1.1.1

 - symfony/polyfill-php70 installed in version v1.0.0
   Release notes: https://github.com/symfony/polyfill-php70/releases/tag/v1.0.0

 - symfony/polyfill-php56 installed in version v1.0.0
   Release notes: https://github.com/symfony/polyfill-php56/releases/tag/v1.0.0

 - ircmaxell/password-compat installed in version v1.0.4
   Release notes: https://github.com/ircmaxell/password_compat/releases/tag/v1.0.4

 - symfony/polyfill-php55 installed in version v1.0.0
   Release notes: https://github.com/symfony/polyfill-php55/releases/tag/v1.0.0

 - symfony/polyfill-php54 installed in version v1.0.0
   Release notes: https://github.com/symfony/polyfill-php54/releases/tag/v1.0.0

 - symfony/polyfill-intl-icu installed in version v1.0.0
   Release notes: https://github.com/symfony/polyfill-intl-icu/releases/tag/v1.0.0

 - symfony/symfony updated from v2.7.7 to v2.8.0
   See changes: https://github.com/symfony/symfony/compare/v2.7.7...v2.8.0
   Release notes: https://github.com/symfony/symfony/releases/tag/v2.8.0

 - symfony/security-acl installed in version v2.7.7
   Release notes: https://github.com/symfony/security-acl/releases/tag/v2.7.7

 - doctrine/doctrine-cache-bundle updated from 1.2.1 to 1.2.2
   See changes: https://github.com/doctrine/DoctrineCacheBundle/compare/1.2.1...1.2.2
   Release notes: https://github.com/doctrine/DoctrineCacheBundle/releases/tag/1.2.2

 - doctrine/doctrine-bundle updated from 1.6.0 to 1.6.1
   See changes: https://github.com/doctrine/DoctrineBundle/compare/1.6.0...1.6.1
   Release notes: https://github.com/doctrine/DoctrineBundle/releases/tag/1.6.1

 - gedmo/doctrine-extensions updated from v2.4.8 to v2.4.9
   See changes: https://github.com/Atlantic18/DoctrineExtensions/compare/v2.4.8...v2.4.9
   Release notes: https://github.com/Atlantic18/DoctrineExtensions/releases/tag/v2.4.9

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