use the tempdir also for npm.load
Added routes for /<package>/missing (Fixes #7)

For npm/npm#4386

When requesting a version that does not exist from the registry, it
returns { "error": "version not found: <version>" }.  This prevents
having to specify mock routes for a version that does not exist by
replying similar to the way the registry does.
hock@~0.2.2
0.5.6
update badges
Update minimum hock version to 0.2.3.

Gain support for request.many.

See: https://github.com/mmalecki/hock/pull/7
0.5.7
update github urls
Add npm-test-peer-deps fixture.

This will help conquer isaacs/npm#4073.
Update documentation a bit.

Includes info on how to add a new fixture.
0.5.8
fix small bug in readme