git-filesync 0.21.3

Current directory reached through a link (Windows): no crash

Changes:

• Run directly ('python git-filesync.py', not through the git alias) in a
  directory reached through a subst drive, it no longer fails with
  "ValueError: path is on mount 'C:', start on mount 'D:'". Through a
  junction, paths are shown without '../' detours. Paths given count from
  the real directory, as for git.

Documentation:

• Pinned example versions in README and MANUAL set to v0.21.3.