Update docs

docs/project-permissions.markdown

@@ -1,14 +1,49 @@
 Project permissions
 ===================
 
-To define project permissions, go to the project page and click on **User management**.
+A project can have two kinds of people: **project managers** and **project members**.
+
+- Project managers can manage the configuration of the project and access to the reports.
+- Project members are standard users, they have less privileges.
+
+When you create a new project, you are automatically assigned as a project manager.
+
+Kanboard administrators can access to everything but they are not necessary project members or managers. Those permissions are defined at the project level.
+
+Permissions for each role
+-------------------------
+
+### Project members
+
+- Use the board (create, move and edit tasks)
+- Remove only tasks created by themselves
+
+### Project managers
+
+- Use the board
+- Configure the project
+	- Share, rename, duplicate and disable the project
+	- Manage swimlanes, categories, columns and users
+	- Edit automatic actions
+- CSV Exports
+- Remove tasks of any project members
+- Access to the analytics section
+
+They **cannot remove the project**.
+
+Manage users and permissions
+----------------------------
+
+To define project roles, go to the **project configuration page** then click on **User management**.
+
+### User management
 
 ![Project permissions](http://kanboard.net/screenshots/documentation/project-permissions.png)
 
-By default, a new project is visible from nobody except administrators.
-The first section tell you who have access to the project.
-**Only those users can be assigned to tasks**.
+From there, you can choose to add new members, change the role or revoke user access.
 
-![Project default permssions](http://kanboard.net/screenshots/documentation/project-nobody-allowed.png)
+### Allow everybody
 
-You can allow only some specific users or choose to allow all Kanboard users.
+If you choose to allow everybody (all Kanboard users), the project is considered public.
+
+That means there is no role management anymore. Permissions per user cannot be applied.