install.sh: Drop support for node <0.8, remove engines bits
version: update shrinkwrap post-check (fixes #6879)

Also fixed up the test to remove GPG tag checks because it's too hard to
set up (need to verify that another way) and to actually commit the new
files so the dirty check will fail if things aren't happening in the
correct order.
npm-registry-client@4.0.5

Some endpoints will return an object property named "error", which is
not the same as the string property containing an error message.
npm is a nice JavaScript package manager
remove preupdate, update, and postupdate because they aren't supported
tar detection looks for magic number (fixes #6868)
which@1.0.8

No longer uses graceful-fs, for some reason known only to @isaacs.
columnify@1.3.2

Various improvements and dependency upgrades.
request@2.51.0

Bug fixes that mostly don't affect npm.
init-package-json@1.1.3

Ensure that dotted variables take precedence over dashed defaults.
update npmjs.org to npmjs.com in docs
update the dist url to point to github releases page
make `outdated` ignore private packages
update changelog for npm@2.1.13
2.1.13
read-package-tree@2.0.0
hosted-git-info@1.5.0
npm-package-arg@3.0.0
realize-package-specifier@2.1.0
npmlog@PROGRESSBARS