KVmemnn setup.sh

[kruus]

setup.sh installs the C library into the torch path, but not the library/*.lua.

For now, I can just setup up so library/*.lua files are findable underneath
${s%luarocks}../share/lua/5.1/library, by continuing the setup.sh approach.

A better approach might install libmemnn and its lua interface via a .spec file
(in which case "library/" might probably not a great name for the lua interface)