Moving fixture into standalone module and new module tests.utils
Moving neighbors tests to tests/integration
Star/Unstar projects
List fans and starred projects

List project fans:

     /projects/<project id>/fans
     /projects/<project id>/fans/<user id>

List user starred projects:

     /users/<user id>/starred
     /users/<user id>/starred/<project id>

Also a "star" field with the stars count of a project is included in the
project detail and list responses.
Merge pull request #43 from taigaio/stars

Star projects