[IMP] accounting documentation (#482)

* [REM] accounting: remove intro page

* [IMP] accounting: update documentation about cash rounding

accounting/receivables/customer_invoices/cash_rounding.rst

@@ -1,52 +1,37 @@
-Set up cash roundings
-=====================
+=============
+Cash Rounding
+=============
+**Cash rounding** is required when the lowest physical denomination 
+of currency, or the smallest coin, is higher than the minimum unit 
+of account.
 
-In some currencies, the smallest coins do not exist. For example, in
-Switzerland, there is no coin for 0.01 CHF. For this reason, if invoices
-are paid in cash, you have to round their total amount to the smallest
-coin that exist in the currency. For the CHF, the smallest coin is 0.05
-CHF.
+For example, some countries require their companies to round up or 
+down the total amount of an invoice to the nearest five cents, when 
+the payment is made in cash.
 
-There are two strategies for the rounding:
-
-1. Add a line on the invoice for the rounding
-
-2. Add the rounding in the tax amount
-
-Both strategies are applicable in Odoo.
-
-Configuration 
---------------
-
-First, you have to activate the feature. For this, go in
-:menuselection:`Accounting --> Configuration --> Settings`
-and activate the Cash Rounding.
+Configuration
+=============
+Go to :menuselection:`Accounting --> Configuration --> Settings` 
+and enable *Cash Rounding*, then click on *Save*.
 
 .. image:: media/cash_rounding01.png
     :align: center
 
-There is a new menu to manage cash roundings in
-:menuselection:`Accounting --> Configuration --> Management --> Cash roundings`.
+Go to :menuselection:`Accounting --> Configuration --> Cash Roundings`, 
+and click on *Create*.
 
-Now, you can create cash roundings. You can choose between two rounding
-strategies:
+Define here your *Rounding Precision*, *Rounding Strategy*, and 
+*Rounding Method*.
 
-1. **Add a rounding line**: if a rounding is necessary, Odoo will add a
-   line on your customer invoice to take this rounding into
-   account. You also have to define the account in which the
-   rounding will go.
+Odoo supports two **rounding strategies**:
 
-2. **Modify tax amount:** Odoo will add the rounding to the amount of
-   the highest tax.
-
-.. image:: media/cash_rounding02.png
-    :align: center
+1. **Add a rounding line**: a *rounding* line is added on the invoice. 
+   You have to define which account records the cash roundings.
+   
+2. **Modify tax amount**: the rounding is applied in the taxes section.
 
 Apply roundings
----------------
-
-Once your roundings are created, you can apply them on customer
-invoices. On the customer invoices, there is a new field called **Cash
-Rounding Method** where you can simply choose one of the rounding methods
-created previously. If needed, a rounding will be applied to the
-invoice.
+===============
+When editing a draft invoice, open the *Other Info* tab, go to the 
+*Accounting Information* section, and select the appropriate *Cash 
+Rounding Method*.