Make Berksfile#has_key? honor --except/--only
Freeze lockfile constants
Remove stale Berksfile test
Move reduce_lockfile! to lockfile.reduce!
Create Lockfile#to_lock (super useful for debugging)
Use a Hash and less Ruby magic for finding transitive dependencies
Add a message that we are now resolving cookbooks
Use new has_dependency? Berksfile API
Make Installer#install a private API
Update json feature to include new output message
Wow... This test was just wrong
Switch logic in dependency?

I must have been on some serious crack when I wrote that logic...
Explain why we keep a list of things to ungraph
Indent private methods