Add a prototype email template

If the templates page contains text messages and emails then there’s two ways it
could be structured:
- into two sections, all text messages first, then all emails
- emails and text messages interleaved, sorted by date

I think the second one is better. Imagine a situation where you mostly do emails
but have a few text messages. You’d have to scroll past the text messages to get
to your emails. Every time.

I reckon that the most commonly accessed templates will be the most recent ones.

app/main/views/_templates.py

@@ -1,20 +1,39 @@
-sms_templates = [
+templates = [
     {
+        'type': 'sms',
+        'name': 'Confirmation',
+        'body': 'Lasting power of attorney: We’ve received your application. Applications take between 8 and 10 weeks to process.'  # noqa
+    },
+    {
+        'type': 'sms',
         'name': 'Reminder',
-        'body': """
-            Vehicle tax: Your vehicle tax for ((registration number)) expires on ((date)).
-            Tax your vehicle at www.gov.uk/vehicle-tax
+        'body': 'Vehicle tax: Your vehicle tax for ((registration number)) expires on ((date)). Tax your vehicle at www.gov.uk/vehicle-tax'  # noqa
+    },
+    {
+        'type': 'sms',
+        'name': 'Warning',
+        'body': 'Vehicle tax: Your vehicle tax for ((registration number)) has expired. Tax your vehicle at www.gov.uk/vehicle-tax'  # noqa
+    },
+    {
+        'type': 'email',
+        'name': 'Application alert 06/2016',
+        'subject': 'Your lasting power of attorney application',
+        'body': """Dear ((name)),
+
+When you’ve made your lasting power of attorney (LPA), you need to register it \
+with the Office of the Public Guardian (OPG).
+
+You can apply to register your LPA yourself if you’re able to make your own decisions.
+
+Your attorney can also register it for you. You’ll be told if they do and you can \
+object to the registration.
+
+It takes between 8 and 10 weeks to register an LPA if there are no mistakes in the application.
         """
     },
     {
-        'name': 'Warning',
-        'body': """
-            Vehicle tax: Your vehicle tax for ((registration number)) has expired.
-            Tax your vehicle at www.gov.uk/vehicle-tax
-        """
+        'type': 'sms',
+        'name': 'Air quality alert',
+        'body': 'Air pollution levels will be ((level)) in ((region)) tomorrow.'
     },
 ]
-
-email_templates = [
-
-]