v3.0.0

• Switch from fog to aws-sdk-v2
• Remove grit
• Implement our own git archive functionality (required after removing grit)
• Lazily load the dockly.rb when rake tasks are being run, not when the tasks are being loaded
• Instead of generating rake tasks for each Deb, Docker, and Rpm, use centralized tasks that are parameterized by the name of the package that is being built.
• Add logic to assume roles at build startup