Close GH-659: fix issue#658 list not working with linked packages.
Do not install linked deps, #659.
Appropriate target for linked packages, #659.
Walk tree no longer walks through linked deps, #659.
Restore incompatible dependencies.
Fix for #670
OS specific cmd execution with child_process
Removed git version message
Removed unused vars
Passed process.stderr param to _write().
Passed process.stderr param to _write().