Error logging in Django application

[dwinslow]

The addition of well-placed logging statements in the Django application will make GeoNode administrators' jobs much easier (and our job when they report issues to us).

Django 1.3 will be adding a new logging system based on the standard logging module, so let's use the standard module for now, and plan to migrate when 1.3 is released.

[dwinslow]

 http://github.com/dwins/geonode/tree/issue_839_django_logging is where I am working on this.

We should also document that activating logging can be accomplished like so:  http://gist.github.com/632909

[dwinslow]

Ok, some basic logging is in place for at least the uploads page. All that's left for this ticket is to use the Django 1.3 logging configuration system, so it is currently blocked on Django 1.3 being released.