* Use test.Repo and AddCommits to set up complex multi-branch tests
* Can commit in the past for history tests, branch, merge and tag
* Can generate random data for files or use what you give it
* Returns full detail of the commits created including SHAs and OIDs
* Can pipe JSON from a batch file into lfstest-testutils to get the same
functionality in acceptance tests
* get_date bash util to create commit dates easily on BSD/Mac and GNU
* see test-push.sh for bash example and scanner_git_test.go for go test
