Revert model update adding separate Nominee_url model
Revert model update adding separate Nominee_url model

Undoing changes due to YAGNI principle.
New solution is to have the server follow the
given url on Nominee submition, follow any redirects, then
record the final url post-redirects.

Revert "added get_urls method to Nominee"
Revert "Replaced Nominee.url with Nominee_url database item"

This reverts commits
39bf9454f4793bddf79cc784b38637569c4bec95
5deba3a800e383dbac94eaae89472a1e2014cfb2.

biviosoftware/publicprize,biviosoftware/publicprize,biviosoftware/publicprize