[ADD] point_of_sale: How to configure your table map?

https://docs.google.com/document/d/1OKijuCn7uM4NT9waJq21ctKNx7XNjEZiPf9d7EvA8Ms/edit#

point_of_sale/restaurant/table.rst

@@ -1,3 +1,81 @@
 ================================
 How to configure your table map?
 ================================
+
+Make your table map
+===================
+
+Once your point of sale has been configured for restaurant usage, click
+on **New Session**:
+
+.. image:: media/table01.png
+    :align: center
+
+This is your main floor, it is empty for now. Click on the **+** icon to
+add a table. 
+
+.. image:: media/table02.png
+    :align: center
+
+Drag and drop the table to change its position. Once you click on it,
+you can edit it.
+
+Click on the corners to change the size.
+
+.. image:: media/table03.png
+    :align: center
+
+The number of seats can be set by clicking on this icon:
+
+.. image:: media/table04.png
+    :align: center
+
+The table name can be edited by clicking on this icon:
+
+.. image:: media/table05.png
+    :align: center
+
+You can switch from round to square table by clicking on this icon:
+
+.. image:: media/table06.png
+    :align: center
+
+The color of the table can modify by clicking on this icon :
+
+.. image:: media/table07.png
+    :align: center
+
+This icon allows you to duplicate the table:
+
+.. image:: media/table08.png
+    :align: center
+
+To drop a table click on this icon:
+
+.. image:: media/table09.png
+    :align: center
+
+Once your plan is done click on the pencil to leave the edit mode. The
+plan is automatically saved.
+
+.. image:: media/table10.png
+    :align: center
+
+Register your orders
+====================
+
+Now you are ready to make your first order. You just have to click on a
+table to start registering an order.
+
+You can come back at any time to the map by clicking on the floor name :
+
+.. image:: media/table11.png
+    :align: center
+
+Edit a table map
+================
+
+On your map, click on the pencil icon to go in edit mode :
+
+.. image:: media/table12.png
+    :align: center