Outline of the doc
Merge pull request #1 from ChristianArnault/master

Outline of the doc
Filling up the doc
Merge pull request #2 from ChristianArnault/master

Filling up the doc
Filling up the doc
Filling up the doc
Outline of the doc
Filling up the doc
Merge pull request #3 from ChristianArnault/master

starting to add material