add get_comments back to conversation model
add get_comments back to conversation model

crewmate/crewmate,teambox/teambox,ccarruitero/teambox,wesbillman/projects,crewmate/crewmate,vveliev/teambox,vveliev/teambox,irfanah/teambox,nfredrik/teambox,vveliev/teambox,nfredrik/teambox,teambox/teambox,irfanah/teambox,nfredrik/teambox,irfanah/teambox,teambox/teambox,wesbillman/projects,rahouldatta/teambox,rahouldatta/teambox,alx/teambox,codeforeurope/samenspel,irfanah/teambox,crewmate/crewmate,ccarruitero/teambox,nfredrik/teambox,rahouldatta/teambox,vveliev/teambox,codeforeurope/samenspel,alx/teambox