loosen nopt dep
v0.0.17
Add platform and arch to the default user-agent
v0.0.18
Don't use a shared tmp dir in homeless envs

Addresses isaacs/npm#3064
v0.0.19
adds semver to dependencies

config-defs.js requires semver but the module is not in the deps.
This is probably not an issue with the way npm uses it but it's
causing a problem when using npmconf and npm-registry-client
separately. Added the same version used by npm-registry-client.
v0.0.20
Added missing ini dependency
v0.0.21
Adding bin-links

Adding "bin-links" option to support isaacs/npm#3090.
Setting it to false will prevent npm from making any symlinks to
binaries when using the "npm install" or "npm link" commands.
v0.0.22
cache-min: Default to 10s
v0.0.23
Merge remote-tracking branch 'upstream/master'