Error on Archive#unpack_to invocation
Extract file copy logic from archive
Add explicit rubygems source to Gemfile
Add minitar as a gem dependency
Implement naive tar unpacker.
Use correct variables when downloading archive
Remove old PE build actions
Bugfixes to unpacking archive.
Merge branch 'refactor_archive_copy'
Merge branch 'refactor_archive_unpack'
Move global config opts into pe_bootstrap config
Deprecate use of global pe_build config
Merge branch 'deprecate_global_config'
Set download variables as UNSET on initialization