Berkshelf is pointing to master of berkshelf-api for tests.

We need to set berkshelf to always_build otherwise we get errors similar to this when running it:

/opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/bundler-1.5.2/lib/bundler/spec_set.rb:92:in `block in materialize': Could not find berkshelf-api-1.2.1 in any of the sources (Bundler::GemNotFound)
Put berks to the end of the dependency list in chefdk since it's now always building.
Merge pull request #166 from opscode/berks-git-test

Set always_build on Berkshelf
Add nokogiri as a dependency to test-kitchen since it's now being included in tk via tailor gem.
Merge pull request #167 from opscode/clean-build-test

Add nokogiri as a dependency to test-kitchen since it's now being included in tk via tailor gem.
Bump chef-client version to 11.12.2
Merge branch 'mm/update-chef-client'
Update md5 checksum for cacert.pem

The certificate was updated as of 2014/04/22.
Lock down versions of all ChefDK's auxiliary gems

Currently when we create a build of ChefDK we get the latest released 
version of every auxiliary gem. This is dangerous at best. This change
locks down the versions.

I also wonder if we should just put these in the ChefDK gemspec OR 
Gemfile. If we decide to create `chef` subcommands that rely on any of
these tools as a library we'll have to (I'm thinking `chef lint`).
Merge pull request #176 from opscode/schisamo/lock-chefdk-auxiliary-gem-versions

Lock down versions of all ChefDK's auxiliary gems
Remove gecode from berks, use vendored gem instead
Add chef-vault to chefdk

* Creates chef-vault as a new software definition
* Adds chef-vault as a dependency of chefdk
* Add chef-vault to the appbundler list
laziness is a virtue unless copy/pasta

* libffi isn't a dependency of chef-vault.
Merge pull request #178 from jtimberman/jtimberman/chef-vault-definition

Add chef-vault to chefdk
typo, slashes and spaces are similar on my keyboard?
annnnd the gem built isnt in pkg/
Include kitchen-vagrant in default package
Bump kitchen-vagrant to 0.15.0 to include fix for kitchen-vagrant#70
Merge branch 'kitchen-vagrant'
Add sqitch and perl_pg_driver