Bump version number to 1.1.0.

And regenerate gemspec.
Remove hirb as a runtime dependency.

It's only used in the example scripts, not in the main library code.
t2-server-admin: Minor fix for readability.

The printout of admin resources was ambigous in its declaration of parameters.
Add a gem version badge from badge.fury.io.
Use bundler and stop using jeweler.
Update dependencies.