Update local gem install instructions for packaging
Added a packaging sample for easy tries of packaging

* Also adjusted README to include information about packaging
  as a jar (tobi can't do mac apps :-) )
* Jar packaging works like a charm btw. thanks @wasnotrice :-)
Update furoshiki version to freshly released 0.2.0

* you might want to `bundle update furoshiki`
* main feature is rubyzip >= 1.0 =)
Merge pull request #901 from shoes/packaging-update

Update packaging dependency to 0.2.0 now supporting rubyzip > 1.0

* Changelog: improvement
* Also some doc changes in the README etc