Do not skip directories when creating tar archive (#72)

* Update targz library to include potential ownership fix

* Move archive logic to main repo

* Remove assertions for debugging

* Use relative path in assertion

* Strip local part from archive location

* Log when extracting in tests

* Fix trimming of prfix

* Add license info to archive.go file

* Undo change in test assertion

* Add test checking for preserved file ownership

* use same postgres version in tests

* Wrap errors when archiving, handle deletion at script layer

test/ownership/.gitignore

@@ -0,0 +1 @@
+local