small fixes on deprecated calls

Merge pull request #60 from serbancatalin/master

fix yaml non-quoted @ deprecated since Symfony 2.8

v1.6.8

• fix case mismatch preventing autoloading on case sensitive systems
• enforce unique version for the client

fixed bug #48

Merge pull request #48 from ccMatrix/master

fix case mismatch

New concise service

Thanks to @dav-m85 the new service is very simple to use with no BC

fixed composer alias on dev-branch

Merge pull request #31 from liuggio/composer_alias

Fixed composer alias