Merge branch 'fc/remote-hg'

Merge branch 'fc/remote-hg'

Updates remote-hg helper (in contrib/).

* fc/remote-hg: (21 commits)
  remote-hg: activate graphlog extension for hg_log()
  remote-hg: fix bad file paths
  remote-hg: document location of stored hg repository
  remote-hg: fix bad state issue
  remote-hg: add 'insecure' option
  remote-hg: add simple mail test
  remote-hg: add basic author tests
  remote-hg: show more proper errors
  remote-hg: force remote push
  remote-hg: push to the appropriate branch
  remote-hg: update tags globally
  remote-hg: update remote bookmarks
  remote-hg: refactor export
  remote-hg: split bookmark handling
  remote-hg: redirect buggy mercurial output
  remote-hg: trivial test cleanups
  remote-hg: make sure fake bookmarks are updated
  remote-hg: fix for files with spaces
  remote-hg: properly report errors on bookmark pushes
  remote-hg: add missing config variable in doc
  ...