Remove some unused completions
Show an error message if git is missing, fixes #3297
Ignore preferGlobal for dependencies
graceful-fs@1.2.1
lockfile@0.3.2
Use log.write instead of console.log to output pretty tree after install
Clarify source of package name in npm link docs.
Fixes bug where the man field is an array
Document that shrinkwrap still needs package.json