Fix Gwenaël name....
Fix French Language
Merge branch 'develop' into Name
Correct French Language
[ci skip] Remove an unused lang string
Fix French Language DB
Merge pull request #37 from dev-ggallon/Name

Little Fixing
Updating some language files from the official translation project.
Removing unused 'imglib_rotation_angle_required' language line.
Tagging a new release candidate v4.0.0-rc54.
Insignificant changes.
Updating  CodeIgniter.
Updating CodeIgniter.
Updating CodeIgniter.
Adapting to the last CodeIgniter update.