Rename doc files

docs/project-configuration.markdown

@@ -0,0 +1,39 @@
+Project settings
+================
+
+Go to the menu **Settings**, then choose **Project settings** on the left.
+
+![Project settings](http://kanboard.net/screenshots/documentation/project-settings.png)
+
+### Default columns for new projects
+
+You can change the default column names here.
+It's useful if you always create projects with the same columns.
+
+Each column name must be separated by a comma.
+
+By default, Kanboard use those column names: Backlog, Ready, Work in progress and Done.
+
+### Default categories for new projects
+
+Categories are not global to the application but attached to a project.
+Each project can have different categories.
+
+However, if you always create the same categories for all your projects, you can define here the list of categories to create automatically.
+
+### Allow only one subtask in progress at the same time for a user
+
+When this option is enabled, a user can work with only one subtask at the time.
+
+If another subtask have the status "in progress", the user will see this dialog box:
+
+![Subtask user restriction](http://kanboard.net/screenshots/documentation/subtask-user-restriction.png)
+
+### Enable time tracking for subtasks
+
+When this option is enabled, each time the status of a subtask is changed, the start time and the end time are recorded in the database for the assignee.
+
+- When the status changes to "in progress" then the start time is saved
+- When the status changes to "done" then the end time is saved
+
+The time spent for the subtask and the task is also updated.