Bug#979250: cinnamon-core: Why does cinnamon-core depend on xorg?

[Fabio Fantoni <fantonifabio@tiscali.it>]

I did some other minimal install tests with debian and ubuntu. Replacing
xorg dep. in cinnamon-core with xserver-xorg on debian is still working
also without recommends but it don't install a terminal (that was one of
xorg deps); I think that can be considered "a must" I'll solve it moving
terminal dep. from cinnamon-desktop-environment to cinnnamon-core. On
ubuntu instead is not working but is not an issue related to
cinnamon-core packages, is lightdm package on ubuntu that is different
from debian one and have greeter as recommmends instead dep. and without
one installed lightdm fails to start.