Fix reading of default parameters in `npm owner`

Not `return`ing `readLocalPkg` caused callaback to be called more than
once.

Also add a default parameter to `npm owner ls` (current package).
engines: node >=0.8
removed superfluous and erroneous node-gyp command replacement
Avoid install failure from that the `treeify` get null
add kei son to authors
Do not ignore GIT_PROXY_COMMAND on install
Add marsup to authors
added node-gyp to the package.json docs
Add mark dube to authors
travis: We only care about 0.8 now
Use public ronn instead of git fork
v1.1.47
No need to check for a readme, read-package-json does that now.
publish: Remove extraneous 'readme' arg
npm-registry-client@0.1.3
v1.1.48
node exe dir to the PATH for lifestyle scripts

Fixes #2680.
update readme for modified install instructions
update glob
update lru-cache