Use 'localhost' exclusively for local port forwarding.

This should fix bug 907742. The behavior change is large enough,
however, that existing documents should be revised.
Merge pull request #298 from BanzaiMan/dev/hasari/bz907742

Merged by openshift-bot
Add support for ruby 2.0.0-p0, needed to preferentially use zlib
Merge pull request #309 from smarterclayton/support_ruby2

Merged by openshift-bot