edit logbooks, new logbook format, increased database normalisation

core/models_survex.py

@@ -92,6 +92,9 @@ class SurvexBlock(models.Model):
     class Meta:
         ordering = ('id',)
 
+    def isSurvexBlock(self): # Function used in templates
+        return True
+
     def __unicode__(self):
         return self.name and unicode(self.name) or 'no name'
     
@@ -188,4 +191,4 @@ class TunnelFile(models.Model):
     
     class Meta:
         ordering = ('tunnelpath',)
-    
+