Update docs
Fixed typo
Fixed spec file, require base kiwi for solver with
Use abstract_method gem
update README: add run "vagrant init" and "dice log"

You need to run "vagrant init" in the directory where you have the
recipe since dice expects to find the Vagrantfile there.

You can run "dice log" at the end to see the progress of the build.

review defaults in Dicefile for 13.* recipes

defaults should be using vagrant boxes. Otherwise, the README
instructions are wrong.