Added ability for JsonModel to accept variables via \JsonSerializable
Merge pull request #10 from zfcampus/feature/process-jsonserialize-when-present-for-jsonmodel

Added ability for JsonModel to accept variables via \JsonSerializable
[#10] CS fixes

- trailing whitespace
- EOF endings
[#10] Imports, and also test against ZF JsonSerializable

- Added import for JsonSerializable
- Also added test against Zend\Stdlib\JsonSerializable, for those on 5.3
[#10] CS fixes

- Added imports (JsonSerializable, PHPUnit_Framework_TestCase)
- Added file-level docblocks
[#10] CS fixes

- Added method docblock to setVariables()
Merge branch 'hotfix/10'

Close #10