Add Sharness 0.3.0
Copy the tests from git.git/contrib remote-hg
Some basic adjustments to ensure the tests run
tests: fix failures due to semantic differences between remote-hg and gitifyhg
HACK: to squelch diffs caused by Mercurial phases

not quite sure what causes this, this must be investigated. but for
now, this change removes some diffs in test-hg-hg-git.t
Fix "git push gitifyhg::URL"