New Logger class

Adding a new class Logger extending the PSR Log rules + its new section
in the demo.

The HTML reporter adapter now uses the Table tool to build HTML table.

Upgrade to version 1.0.5
Mini-correction on the DirectoryHelper

... to avoid errors or miss-returned
Cleaning stuff

New common gitignore of Les Ateliers.

Completing the README with authors infos.
Clean the "dev" branch

New common gitignore of Les Ateliers for the "dev" branch

Merging commit 8aafb53f90 from "master".