Tue 29 Feb 2024 : added the folder manual.

Sun 16 Jan 2022 : renamed the directory Lib into C.  Added lib as a folder.
  Added the folder Julia.

Tue 22 Jun 2021 : new directory Mod with the code for the extension module
  for Python, to define phcpy.

Mon 5 Oct 2015 : new directory cgi with scripts for the web interface.
