create DbUserRepositoryTest.php
create test for DbUserRepository()->all()
create test for DbUserRepository()->find()
Merge branch 'master' into feature/DbUserRepositoryTest

* master:
  Refactor the update interface
  Refactor Post Create interface to use array
create test for DbUserRepository()->create()
create test for DbUserRepository()->login()
create test for DbUserRepository()->delete()
Merge pull request #12 from MetalMatze/feature/DbUserRepositoryTest

create DbUserRepositoryTest