Convert strings to IPAddr objects
Convert strings to IPAddr objects

The RemoteIp middleware doesn't do this automatically so will just
do a string comparison and return the first ip in the list.

joelanman/e-petitions,alphagov/e-petitions,joelanman/e-petitions,alphagov/e-petitions,unboxed/e-petitions,unboxed/e-petitions,unboxed/e-petitions,alphagov/e-petitions,joelanman/e-petitions,alphagov/e-petitions,unboxed/e-petitions