Update Travis settings for Rubinius
Bump version to 0.2.1
Remove pry-rescue from Gemfile
Use resolution-independent SVG badges [ci skip]
Revert "Raise an error if the api key isn't set or is nil."

This reverts commit d885b56da9c3e81e0f0b94b9a611df905e0bacf2.
Stop signing gem [ci skip]
Bump version to 0.2.2
Fix RuboCop offenses introduced in version 0.19.0