* added switch to extract different sources as build context
* first rough implementation of aws s3
* added buildcontext package and interface
* added GetBuildContext func to buildcontext.go
added fallback to gcs
renamed GC struct to GCS
* improved the default behavior of build context retrieval
* renamed gc:// to gs:// in order to follow common standards
* renamed struct File to Dir and some cleanup work
* moved context.tar suffix to the buildcontext processors where it is needed
* added buildcontext retrieval as struct variable
added fallback if prefix in bucket specifier is present
* cleanup if structures
* added prefix to s3
* WIP
* Fixed build context bugs
* refactored build context
* adding reproducible test
* newer version of go-containerregistry
* new ImageOptions
* switch reproducible flag to default to false
* small fixes
* update dep
* Vendor changes for go-containerregistry switch.
* Manual changes for go-containerregistry switch.
The biggest change is refactoring the tarball unpacking.
* Pull more of container-diff out.
* More vendor removals.
* More unit tests.
priyawadhwa
Christian Jantz
Sharif Elgamal
jesusofsuburb1a
dlorenc
Nicolas Byl
Carlos Sanchez
Matt Rickard