Merge pull request #27 from stephaniefaureadfab/develop

Develop
Merge pull request #28 from stephaniefaureadfab/develop

correction Unit Test
requires ZF 2.*
User implements UserInterface
Merge pull request #29 from AlexandreBeaurain/develop

Various very minor changes
Ooops, User seems to be incompatible with UserInterface (very strange)
Merge pull request #31 from AlexandreBeaurain/develop

Ooops, User seems to be incompatible with UserInterface (very strange)
modify postal_code name, type and verification