package.json indentation
abstract server diffing into a separate module

https://github.com/sindresorhus/semver-type-diff
various tweaks
more keywords
use `latest-version` module and remove a couple of options

https://github.com/sindresorhus/latest-version

Remove a couple of bloated options.
code style
remove `packagePath` option
only notify() when an update is available and process is TTY
remove unused dep
add support for custom npm registry - fixes #32

just specify it like you would with npm
using spawn() instead of fork()

by using a detached process a quick parent doesn't kill a slow child
Merge pull request #38 from Bartvds/rewrite

using spawn() instead of fork() (for rewrite branch)