Milestone 2.0 Release

This PR encapsulates the changes we've made to aminator over the past several months as well as the major refactorings to the plugin and chroot/provisioner relationship.

Please see the Milestone 2.0 issue list as well as the forthcoming documentation to understand the changes we've made to aminator to make the plugin development more manageable by external plugin contributors.

Many thanks to those that have submitted plugins to the original aminator code base and we're happy to help with  porting the plugins to the new plugin [repo] (https://github.com/aminator-plugins)

/cc @viglesiasce @bunjiboys @pas256 @bmoyles