Add library classes to upload cookbooks via Policyfile
Enable rspec verification of method stubs
Test Policyfile uploader
Add tests for recipe normalization in lockfile
Skip chefignore-d files when calculating checksums
Test cookbook loading for uploads
Update data bag representation of policyfile to match chef-client
Clean up TODOs related to issues in chef-client codebase.
Update gemspec to require chef 12.0 prerelease or greater
Remove direct dependency on chefspec
TEMPORARY FIX - point gemfile at git branch of chef client for now