Add dirty fields mixin so we can see if fields have been changed or not.
Update the progress line approximately line every second and show the lines per
second being processed.
Make sure the correct amount of columns are being parsed.

Add an hack which skips over the commented lines (or any other wrong lines)
As optimization keep a lot more objects in memory, instead of bugging the
database.

Also, make sure the model instances are dirty before .save()ing.