Session storage and cookie lifetime configuration.
Wrong default storage.
Added factory for session storage options
Merge branch 'master' into dynamic-session-options

Conflicts:
	Resources/config/services.yml
Merge pull request #332 from ngodfraind/master

Add maintenance mode
CSV
Merge pull request #339 from ngodfraind/csv-semicolon

CSV
Merge branch 'db-session' of http://github.com/ngodfraind/CoreBundle into dynamic-session-options

Conflicts:
	Controller/Administration/ParametersController.php
	DependencyInjection/Compiler/DynamicConfigPass.php
	Library/Configuration/PlatformConfiguration.php
	Library/Configuration/PlatformConfigurationHandler.php
	Listener/CookieLifetimeSetter.php
	Resources/views/Administration/platform/index.html.twig
Removed unused translation files
Added form validation and error handling
Merge pull request #337 from ngodfraind/db-session

Session storage and cookie lifetime configuration.