Updated readme

readme.md

@@ -9,7 +9,7 @@ Extremely simple wrapper for iFirma API.
 
 - generating invoice in iFirma service
 
-**Planned**
+**Very soon**
 
 - downloading invoice PDF
 - generating proforma invoice
@@ -30,39 +30,37 @@ iFirma offers [demo account](https://www.ifirma.pl/cgi-bin/WebObjects/ifirma-dem
 
 ##Usage
 
-
-1. Create instance of iFirmaAPI
-
+#####1. Create instance of iFirmaAPI
 ```python
 ifirma_client = iFirmaAPI(TEST_IFIRMA_USER, TEST_IFIRMA_INVOICE_KEY, TEST_IFIRMA_USER_KEY)
 ```
-2. Create invoice parameters
-
+#####2. Create invoice parameters
 ```python
+client = Client(
+    "Dariusz Aniszewski's Company",  # company name
+    "PL1231231212",  # Tax ID
+    Address(
+        "Otwock",  # City
+        "00-000"  # Zip code
+    ),
+    email="email@server.com",
+)
 
-    client = Client(
-        "Dariusz",
-        "1231231212",
-        Address(
-            "Warszawa", 
-            "03-185"
-        ),
-        email="email@server.com",
-    )
-    
-    position = Position(
-        VAT.VAT_23, 
-        1, 
-        1000, 
-        "nazwa", 
-        "szt"
-    )
+position = Position(
+    VAT.VAT_23,  # VAT rate 
+    1,  # Quantity
+    1000,  # Unit price
+    "nazwa",  # Position name
+    "szt"  # Position unit
+)
 ```
-3. Create invoice in iFirma service and get it's id
 
+#####3. Create invoice in iFirma service and get it's id
 ```python
 invoice = NewInvoiceParams(client, [position])
 invoice_id = ifirma_client.generate_invoice(invoice)
 ```
 
-That's all folks
+In near futore you can use `invoice_id` to perform other actions like downloading PDF or getting details.
+
+**That's all folks**