Update release notes for v0.9.3.
Update release notes for v0.9.3.

NeighborhoodGuard/communityview,dougkerr/surveillance,NeighborhoodGuard/communityview,NeighborhoodGuard/communityview,dougkerr/surveillance,dougkerr/surveillance,dougkerr/surveillance,NeighborhoodGuard/communityview,JesperJurcenoks/communityview,JesperJurcenoks/communityview,NeighborhoodGuard/communityview,dougkerr/surveillance