[ADD] crm: How to import contacts to the CRM?

https://docs.google.com/document/d/1JCb3U37sSFB33OGMHG9FLGmy3Pzmuue3ESgHwRHgUsE/edit#

crm/leads/generate/import.rst

@@ -1,3 +1,97 @@
 ==================================
 How to import contacts to the CRM?
 ==================================
+
+In Odoo CRM, you can import a database of potential customers, for
+instance for a cold emailing or cold calling campaign, through a CSV
+file. You may be wondering if the best option is to import your contacts
+as leads or opportunities. It depends on your business specificities and
+workflow:
+
+-  Some companies may decide to not use leads, but instead to keep all
+   information directly in an opportunity. For some companies, leads
+   are merely an extra step in the sales process. You could call
+   this extended (start from lead) versus simplified (start from
+   opportunity) customer relationship management.
+
+-  Odoo perfectly allows for either one of these approaches to be
+   chosen. If your company handles its sales from a pre
+   qualification step, feel free to activate first the lead stage as
+   described below in order to import your database as leads
+
+Activate the lead stage
+=======================
+
+By default, the lead stage is not activated in Odoo CRM. If you want to
+import your contacts as leads rather than opportunities, go to
+:menuselection:`Configuration --> Settings`, select the option **use leads
+if…** as shown below and click on **Apply**.
+
+.. image:: ./media/import01.jpg
+   :align: center
+
+
+This activation will create a new submenu :menuselection:`Sales --> Leads`
+from which you will be able to import your contacts from the
+**Import** button (if you want to create a lead manually, :doc:`click here <manual>`)
+
+.. image:: ./media/import02.jpg
+   :align: center
+
+Import your CSV file
+====================
+
+On the new submenu :menuselection:`Sales --> Leads`, click on **Import** and select your
+Excel file to import from the **Choose File** button. Make sure its
+extension is **.csv** and don't forget to set up the correct File format
+options (**Encoding** and **Separator**) to match your local
+settings and display your columns properly.
+
+.. note::
+	If your prospects database is provided in another format than CSV, you can
+	easily convert it to the CSV format using Microsoft Excel, OpenOffice /
+	LibreOffice Calc, Google Docs, etc.
+
+.. image:: ./media/import03.jpg
+   :align: center
+
+Select rows to import
+=====================
+
+Odoo will automatically map the column headers from your CSV file to the
+corresponding fields if you tick *The first row of the file contains the
+label of the column* option. This makes imports easier especially when
+the file has many columns. Of course, you can remap the column headers
+to describe the property you are importing data into (First Name, Last
+Name, Email, etc.).
+
+.. image:: ./media/import04.jpg
+   :align: center
+
+.. tip::
+
+	If you want to import your contacts as opportunities rather than leads, make
+	sure to add the *Type* column to your csv. This column is used to indicate
+	whether your import will be flagged as a Lead (type = Lead) or as an
+	opportunity (type = Opportunity).
+
+Click the **Validate** button if you want to let Odoo verify that
+everything seems okay before importing. Otherwise, you can directly
+click the Import button: the same validations will be done.
+
+.. note::
+
+	For additional technical information on how to import contacts into Odoo CRM,
+	read the **Frequently Asked Questions** section located below the Import tool
+	on the same window.
+
+.. seealso::
+
+	- :doc:`manual`
+	- :doc:`from_emails`
+	- :doc:`website`
+
+.. rst-class:: text-muted
+
+| Written by Geoffrey Bressan (Odoo)
+| Proofread by Samuel Cabodi (Odoo)