installation documentation

[at0mb0y]

Hello,
it seems nobody get problem to install it but I've try on linux and mac and got a similar problem : nngraph can't find graphiz.
nngraph is installed with :
luarocks install nngraph
and graphiviz with :
sudo apt-get install graphviz -y
and brew command on osx

on linux :
/torch/install/share/lua/5.1/graph/graphviz.lua:145: attempt to call field 'gvContext' (a nil value)
I have this error message
on mac it's another message : it can't load libgvplugin_dot_layout.6.dylib
is the installation sequence is important ? luarocks before graphviz ?

best regards