Add notes to profile form about being able to edit form

Also about the known issue with some emoji

vendor/registrasion/registrasion/views.py

@@ -336,6 +336,10 @@ def _guided_registration_profile_and_voucher(request):
     profile_section = GuidedRegistrationSection(
         title="Profile and Personal Information",
         form=profile_form,
+        description=("<div class=\"text-info\"><em>You can come back and edit these details any time before January 13, "
+                     "2018.</em></div>"
+                     "<div class=\"text-warning\"><strong class=\"label-warning\">Known issue:</strong> This form breaks with certain emoji ☹. "
+                     "You'll be able to come back and add emoji to free text fields once we fix this.</div>"),
     )
 
     return [voucher_section, profile_section]