README: ASCII tree with unicode
README: ASCII tree with unicode

Enhance the ASCII art representing the conventional directory
structure:

Suffix directories with a '/' to better differentiate them from regular
file (same as `ls -F`).

Use Unicode characters for slightly better rendering. That is the
equivalent of `tree -AF. See Unicode block "Box Drawing":
https://en.wikipedia.org/wiki/Box_Drawing

Make it slightly smaller by removing vertical lines between a directory
entry and the file it contains.

DavidS/rspec-puppet,rodjek/rspec-puppet,puppetlabs/rspec-puppet