Merge pull request #1619 from antograssiot/3.0_installation

3-0 installation instructions update
[fr] follow #1614

3.0 correct link to ProGit book
[fr] follow c6547b5

Update info regarding return value from authenticate provider.
[fr] follow #1613

Shell::param()
[fr] follow #1610

Fix eg. code.
[fr] follow #1611 & follow en

3.0 doc correct model link on index page
[fr] follow 62eece1

Fix example code.
[fr] follow #1602

table-objects, fix deleteAll example
[fr] follow #1601

Update docs for App::objects() removal.
[fr] rearrange logging to follow en
[fr] update files from root folder

follow en version