Update to django-eadred v0.2
Add test for generatedata and tweak sampledata code

This makes sure that generatedata always works plus it tweaks the
code to account for the fact that we created some data in migrations
but it doesn't otherwise exist in an empty db.
[bug 837851] Add permission to edit keywords field
[bug 847463] Pull extra top contributors

In case any in the top 10 have been deleted.