New remote helper for hg.
* fc/remote-hg: (22 commits)
remote-hg: fix for older versions of python
remote-hg: fix for files with spaces
remote-hg: avoid bad refs
remote-hg: try the 'tip' if no checkout present
remote-hg: fix compatibility with older versions of hg
remote-hg: add missing config for basic tests
remote-hg: the author email can be null
remote-hg: add option to not track branches
remote-hg: add extra author test
remote-hg: add tests to compare with hg-git
remote-hg: add bidirectional tests
test-lib: avoid full path to store test results
remote-hg: add basic tests
remote-hg: fake bookmark when there's none
remote-hg: add compat for hg-git author fixes
remote-hg: add support for hg-git compat mode
remote-hg: match hg merge behavior
remote-hg: make sure the encoding is correct
remote-hg: add support to push URLs
remote-hg: add support for remote pushing
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