Fix CSRF issues in svx form

Set date formats
Add DataIssue model and add errors to it to allow us to give people a list of
stuff to fix

core/views_survex.py

@@ -1,6 +1,7 @@
 from django import forms
 from django.http import HttpResponseRedirect, HttpResponse
-from django.shortcuts import render_to_response
+from django.shortcuts import render_to_response, render
+from django.core.context_processors import csrf
 from django.http import HttpResponse, Http404
 import re
 import os
@@ -172,6 +173,7 @@ def svx(request, survex_file):
             'difflist': difflist,
             'logmessage':logmessage,
             'form':form}
+    vmap.update(csrf(request))
     if outputtype == "ajax":
         return render_to_response('svxfiledifflistonly.html', vmap)
     return render_to_response('svxfile.html', vmap)