Add association spec to Proposal
Add association spec to Proposal

lucasrenan/call4paperz,ricardovaleriano/call4paperz,ricardovaleriano/call4paperz,call4paperz/call4paperz,ricardovaleriano/call4paperz,lucianosousa/call4paperz,lucasrenan/call4paperz,lucasrenan/call4paperz,call4paperz/call4paperz,ricardovaleriano/call4paperz,lucianosousa/call4paperz,lucianosousa/call4paperz,lucianosousa/call4paperz,call4paperz/call4paperz