URLs consistency

I modified a lot of URLs redirection, creation, etc...
I modified routes.php too in order to obtain more consistent urls (like in redmine)

I know there must be some others things to change, but I did some and projects are usable like this as far as I know.

Plus, I modified the settings and modules tabs of the project in order to have some labels clickable to modify checkboxes (it's more convenient I think, I don't know if Redmine does this, but it's important for me).