pull: adapt from upstream changes to transactions Mercurial rev 52db731b964d introduced a transaction manager upstream. This means that the closetransaction and releasetransaction methods on the pull operation have gone away. Code mostly based on Siddharth Agarwal's work on hg-git.

include Makefile hgsubversion/help/*.rst tests/fixtures/invalid_utf8.tar.gz
recursive-include tests *.py *.sh *.svndump *.txt