Collect organisation type

So that we can default services to their appropriate text allowance, we
need to find out what sector they're in. So let's start collecting that
from teams as they create new services.

I think Central/Local/NHS are the right options, but these can be easily
changed if not.

app/main/forms.py

@@ -213,7 +213,7 @@ class TextNotReceivedForm(Form):
     mobile_number = international_phone_number()
 
 
-class ServiceNameForm(Form):
+class RenameServiceForm(Form):
     name = StringField(
         u'Service name',
         validators=[
@@ -221,6 +221,23 @@ class ServiceNameForm(Form):
         ])
 
 
+class CreateServiceForm(Form):
+    name = StringField(
+        u'What’s your service called?',
+        validators=[
+            DataRequired(message='Can’t be empty')
+        ])
+    organisation_type = RadioField(
+        'Who runs this service?',
+        choices=[
+            ('central', 'Central government'),
+            ('local', 'Local government'),
+            ('nhs', 'NHS'),
+        ],
+        validators=[DataRequired()],
+    )
+
+
 class ConfirmPasswordForm(Form):
     def __init__(self, validate_password_func, *args, **kwargs):
         self.validate_password_func = validate_password_func