fixed possible scope validation error for password, client_credentials and extension grants while retrieving access token

FriendsOfSymfony/FOSOAuthServerBundle#190
Merge pull request #40 from FriendsOfSymfony/hotfix/grants-scope-validation-fix

Fixed possible scope validation error...
Current implementation retrieves bearer access token from entity-body only if its POST request. Bearer token usage spec states that other HTTP methods are suitable too.

FriendsOfSymfony/FOSOAuthServerBundle#94
Merge pull request #41 from FriendsOfSymfony/hotfix/bearer-token-authorization

fixed bearer access token retrieval
Prevent multiple uses of an auth code

Fix #36 by changing the expiration date of the auth code.
Note that it changes the interface and requires to bump version number.
Merge branch 'Spomky-AuthCode-expiration'
Merge branch 'Spomky-AuthCode-expiration'
bumped up development branch version
.travis.yml - add PHP 5.5
Merge pull request #48 from sasezaki/patch-1

.travis.yml - add PHP 5.5
Merge branch 'master' of https://github.com/FriendsOfSymfony/oauth2-php