add more clarification to docs
add more clarification to docs

virajs/go-lxc,virajs/go-lxc,dropbox/go-lxc,caglar10ur/go-lxc-deprecated,anupcshan/go-lxc,caglar10ur/go-lxc-deprecated,dropbox/go-lxc,anupcshan/go-lxc