Add, and use, the ability to remove a file from the Subversion test repo.
Add ability to specify revision to GitSvnRepo.clone().
Add GitSvnRepo.rebase() to update the git-svn repo.
Clean up some of the git command arguments.
Make some changes to try to keep test costs down, and prepare to test upcoming "ignore-revs" feature.
Add ability to ignore revisions in GitSvnRepo's clone/rebase.
Try reducing the time required to run unit tests further, by creating more tests that use class fixtures.