Update docs for ability to raise pfi without sending email

.gitignore

@@ -3,3 +3,4 @@
 /env/
 .idea
 /__pycache__/
+.DS_Store

pages/proforma-invoices/create-a-pfi.md

@@ -1,8 +1,10 @@
-### Create a Proforma Invoice
+### Create a Proforma Invoice 
 
 Creating a Proforma Invoice can be done by simply supplying the `amount`, the `client` who you want to create it for, 
-and whether you want to send it immediately (`send_pfi`). If you have `send_pfi` set to `True`, the PFI will have the 
-status 'Unpaid', and an email will be sent to them with the details about the PFI including the PDF.
+and whether you want to send it immediately or not using the `raise_behaviour` variable. 
+
+`send_pfi` is being replaced with `raise_behaviour`. The options are `dont-raise`,`raise` or `raise-and-send`. If no value is passed or `dont-raise` is passed then the 
+PFI will be created as draft. If `raise` is passed then the PFI will be created and raised to the status 'Unpaid' but no notifcations will be sent to clients. If `raise-and-send` is passed then the PFI will be created and raised to the status 'Unpaid' and notifcations will be sent to clients to request payment.
 
 **Note that, if a Proforma Invoice exists that is either Draft or Confirmed, TutorCruncher will simply add a 
-new item to it and it will NOT be raised, even if `send_pfi` is set to `true`.**
+new item to it and it will NOT be raised, even if `raise` or `raise-and-send` are passed.**

pages/proforma-invoices/create-a-pfi.py

@@ -4,7 +4,7 @@
 data = {
     'amount': 120,
     'client': 312,
-    'send_pfi': True,
+    'raise_behaviour': 'raise-and-send',
     'description': 'Credit Request for Billy Holiday'
 }
 r = requests.post('https://secure.tutorcruncher.com/api/proforma-invoices/', json=data, headers=headers)