Add announcements table to schema
Add announcements table to schema

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