git-svn: make the $GIT_DIR/svn/*/revs directory obsolete
This is a very intrusive change, so I've beefed up the tests
significantly. Added 'full-test' a target to the Makefile,
to test different possible configurations. This is intended
for maintainers only. Users should only be concerned with
'test' succeeding.
We now have a very simple custom database format for handling
mapping of svn revisions => git commits. Of course, we're
not really using it yet, either.
Also disabled automatic branch-finding on new trees for now.
It's too easily broken. revisions_eq() function should be
helpful for branch detection.
Also removed an extra assertion in fetch_cmd() that wasn't
correctly done. This bug was found by full-test.
Signed-off-by: Eric Wong <normalperson@yhbt.net>