Various updates to fast-export used in the context of the remote
helper interface.
* fc/fast-export-fixes:
fast-export: make sure updated refs get updated
fast-export: don't handle uninteresting refs
fast-export: fix comparison in tests
fast-export: trivial cleanup
remote-testgit: implement the "done" feature manually
remote-testgit: report success after an import
remote-testgit: exercise more features
remote-testgit: cleanup tests
remote-testgit: remove irrelevant test
remote-testgit: remove non-local functionality
Add new simplified git-remote-testgit
Rename git-remote-testgit to git-remote-testpy
remote-helpers: fix failure message
remote-testgit: fix direction of marks
fast-export: avoid importing blob marks