Added ProposalDuplicates model and logic.
This will be used for storing the answer on duplicate calculations.
Patch by: Lennard de Rijk
Reviewed by: to-be-reviewed
include AUTHORS
include INSTALL
include LICENSE
recursive-include docs *
recursive-include scripts *
recursive-include django/conf/locale *
recursive-include django/contrib/admin/templates *
recursive-include django/contrib/admin/media *
recursive-include django/contrib/comments/templates *
recursive-include django/contrib/sitemaps/templates *