Use the bleeding edge of the Berkshelf

see also
https://github.com/berkshelf/berkshelf/wiki/Howto:-Use-the-bleeding-edge
Avoiding error when bundle from jruby

See also https://github.com/net-ssh/net-ssh/blob/master/README.rdoc
"""
NOTE: If you are running on jruby you need to install jruby-pageant
manually (gemspec doesn't allow for platform specific dependencies).
"""
Ignore Bundler working directory
Bundle install

$ bundle install
Use Vagrant

$ vagrant init
Delete template comment in the Vagrantfile
Ignore vagrant working directory
Use Berksfile
Use Chef-Solo as Vagrant's provision
Use Vertx
Use git
Add cookbooks_path
Use vertx-gradle-template