Update npm-shrinkwrap.json

Includes the dependencies for the latest version of popit-api.

Updated using latest npm, so this should work correctly with newer
versions of npm, older version will simply ignore fields that they don't
understand.
Fix broken documentation links

Use absolute links rather than relative ones to prevent 404s
Upgrade production node version to v0.10.24

If the installed node version doesn't match the configured version, it
will be upgraded.

This also switches to using the pre-built binaries from nodejs.org,
which significantly reduces the install time for a new version of node.
Add process.versions output to dev helpers

This makes it easier to see which version of node you're currently
running, along with other useful information about which software node
was compiled with.
Build all branches except production on travis
Rebuild npm-shrinkwrap.json using latest node

After clearing out my npm cache (`npm cache clear`) and removing my
local node_modules directory I did a fresh install using the shrinkwrap
file from master, then re-ran `npm shrinkwrap` and it gave this output.

It seems to install correctly under the latest 0.8.x with npm 1.2.30, as
well as under 0.10, so I can't see any problems with it.
deploy to production - version bump to 0.0.17