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/models.py

@@ -870,3 +870,11 @@ class Survey(TroggleModel):
 
     def elevations(self):
         return self.scannedimage_set.filter(contents='elevation')
+
+class DataIssue(TroggleModel):
+    date = models.DateTimeField(auto_now_add=True, blank=True)
+    parser = models.CharField(max_length=50, blank=True, null=True)
+    message = models.CharField(max_length=400, blank=True, null=True)
+
+    def __unicode__(self):
+        return u"%s - %s" % (self.parser, self.message)