Develop

Hi,

Since I would like to use it for public project, I added the possibility to set projects as private or not, thus a non logged user will be able to see the project and its issues through /index.php/projects. 

However a user still have to be logged to create new issue or something else that modify the project.

I also added a private attribute for User in order to show or not the identity of the user. If the user is set to private all his activities will appear as anonymous.

By default projects and users are set to private, thus the original behavior is unchanged.

Cheers