* 2.1:
fixed doc references (closes#7515)
small changes
[SecurityBundle] Fixed configuration exemple
idAsIndex should be true with a smallint or bigint id field.
Fixed long multibyte parameter logging in DbalLogger:startQuery
Keep the file extension in the temporary copy and test that it exists (closes#7482)
[Validator][translation][japanese]replaced period to japanese one [Validator][translation][japanese]fixed japanese translation to more practical one [Validator][translation][japanese]fixed message ordering to be consistent with other languages [Validator][translation][japanese]added new validation messages in japanese translation
Conflicts:
src/Symfony/Component/Validator/Resources/translations/validators.ja.xlf
* Switched to Composer to manage "dev" dependencies
* Fixed READMEs
* Excluded vendor in phpunit.xml.dist files
* Fixed message in bootstrap.php files
* Added autoloader for the component itself