2.0.6

Release 2.0.6

• Deserializer added to convert json string into a Swagger Annotations object (@csimplestring)
• Various readme improvements (@spekulatius)
• Various PSR-2 coding standard fixes (@bravo-kernel)
• Travis now enforces passing PHP CodeSniffer PSR-2 tests (@bravo-kernel)
• Readme badges now use shields.io (@bravo-kernel)