[ADD] project: How to gather feedback from customers?

https://docs.google.com/document/d/19CoYRHaBFnWr3AwTVnAq1lDmQgjDrkfkJj6fCcZ8X0Y/edit

project/advanced/feedback.rst

@@ -1,3 +1,113 @@
 ======================================
 How to gather feedback from customers?
 ======================================
+
+Overview
+========
+
+As a manager, it's not always simple to follow everything your teams do.
+Having a simple customer feedback can be very interesting to evaluate
+the performances of your temas. You can very easily gather feedbacks
+from your customers using Odoo.
+
+An e-mail can be sent during the project to get the customer feedbacks.
+He just has to choose between 3 smileys to assess your work (Smile,
+Neutral or Sad).
+
+How to gather feedbacks from customers
+======================================
+
+Before getting started some configuration is necessary. First of all
+it's necessary to install the **Project** application. To do so simply 
+go to the apps module and install it.
+
+.. image:: media/feedback01.png
+    :align: center
+
+Moreover, in the same menu, you have to install the **Project Rating**
+module.
+
+.. image:: media/feedback02.png
+    :align: center
+
+Next, go back into the back-end and enter the project module. Select the
+**Configuration** button and click on **Settings** in the dropdown menu. Next
+select **Allow activating customer rating on projects, at issue
+completion**. Don't forget to apply your changes.
+
+.. image:: media/feedback03.png
+    :align: center
+
+How to get a Customer feedback?
+===============================
+
+A e-mail can be sent to the customers at each stage of the ongoing
+projects.
+
+First, you need to choose for which projects you want to get a feedback.
+
+Project configuration
+---------------------
+
+Go to the **Project** application, in the project settings select the 
+**Customer satisfaction** option.
+
+.. image:: media/feedback04.png
+    :align: center
+
+Email Template
+--------------
+
+Go to the stage settings (click on the gear icon on the top of the stage
+column, then select **Edit**). Choose the e-mail template that will be used.
+You can directly edit it from there.
+
+.. image:: media/feedback05.png
+    :align: center
+
+Here is an email example that a customer can receive :
+
+.. image:: media/feedback06.png
+    :align: center
+
+.. note::
+    The customer just has to click on a smiley (Smile, Neutral or
+    Sad) to assess your work. The customer can reply to the email to add
+    more information. It will be added to the chatter of the task.
+
+Reporting
+---------
+
+You have a brief summary on the satisfaction in the upper right corner
+of the project.
+
+.. image:: media/feedback07.png
+    :align: center
+
+How to display the ratings on your website?
+===========================================
+
+First of all it's necessary to install the **Website Builder** application.
+To do so simply go to the apps module and search for the website
+builder.
+
+.. image:: media/feedback08.png
+    :align: center
+
+Moreover, in the same menu, you have to install the **Website Rating
+Project Issue** module.
+
+.. image:: media/feedback09.png
+    :align: center
+
+Then, you will be able to publish your result on your website by
+clicking on the website button in the upper right corner and confirming
+it in the front end of the website.
+
+.. image:: media/feedback10.png
+    :align: center
+
+.. seealso::
+    * :doc:`claim_issue`
+    * :doc:`invoicing`
+    * :doc:`external`