Fix a typo
Merge pull request #173 from BraisGabin/patch-1

Fix a typo
Fixed typo
Merge pull request #179 from fixe/patch-1

Fixed typo
documented anonymous access
Merge pull request #191 from FriendsOfSymfony/feature/anonymous-access-documentation

documented anonymous access
Corrected depending on the developers' branch
Added method implements the removal of the used auth code
removed minimum-stability
added tests of OAuthStorage::markAuthCodeAsUsed()

#193
sync with latest FriendsOfSymfony/oauth2-php