Merge pull request #22 from mremi/master

Merge branch 2.2 into master
Merge pull request #23 from mremi/handle-drupal-entity

Handled Drupal entities to easy use in Symfony
Added Travis file
Merge pull request #24 from mremi/add-travis-file

Added Travis file
Removed duplicated service definition
Added configuration to prefix name of Symfony tables
Merge pull request #25 from mremi/table-prefix

Added prefix to Symfony tables
Added tips in documentation to filter Symfony tables
Merge pull request #26 from mremi/table-prefix

Added tips in documentation to filter Symfony tables
Fixed php bug #61272
Merge pull request #27 from mremi/fix-php-bug

Fixed php bug #61272
Add session.refresh_cookie_lifetime config parameter used in DrupalSessionStorage

Refactor test

Add missing documentation

Add Travis status icon
Merge pull request #28 from eko/master

Add a session.refresh_cookie_lifetime config parameter
Fixed priority of exception listener service to be compliant with SonataPageBundle
Merge pull request #29 from mremi/fix-priority

Fixed priority of exception listener service to be compliant with SonataPageBundle
Added some finders to retrieve some published contents