www/rubygem-kaminari-rails4: Update from 0.17.0 to 1.1.1

Changelog: https://github.com/kaminari/kaminari/blob/v1.1.1/CHANGELOG.md

Also:

• Update RUN_DEPENDS as needed
• Update pkg-descr to reflect its a Rails 4 project
• Update WWW

Submitted by: Matthias Fechner <idefix@fechner.net>