Fixes handling of symlinks that point to ".HFS+ Private" directories
Fixes handling of symlinks that point to ".HFS+ Private" directories

Previously, if a symlink points to a directory residing in the ".HFS+
Private" folder, `get_real_path` would incorrectly resolve the symlink.
This commit changes `get_real_path` to use `lstat` instead of `stat`, so
that it will correctly preserve the symlink.

Fixes #16

abique/tmfs