[svn] Weeks of local changes.

- Import is now non-destructive
- Parsers write output to a log file (path be specified in settings)
- databaseReset.py content been divided into separate functions which can be called for varying levels of deletion and importing
- control panel (view, template, urlpattern) added for deleting and importing
- Logins and signup fixed
- CaveArea model updated, view, hierarchical url patterns, and beginning of template added
- New site style
Copied from http://cucc@cucc.survex.com/svn/trunk/expoweb/troggle/, rev. 8324 by cucc @ 5/3/2009 5:56 AM

save_carefully.py

@@ -0,0 +1,10 @@
+def save(objectType, lookupAttribs={}, nonLookupAttribs={}):
+
+    instance, created=objectType.objects.get_or_create(defaults=nonLookupAttribs, **lookupAttribs)
+
+    if not created and not instance.new_since_parsing:
+        for k, v in nonLookupAttribs.items(): #overwrite the existing attributes from the logbook text (except date and title)
+            setattr(instance, k, v)
+        instance.save()
+    
+    return instance