SONATA-265 - Documentation improvement
SONATA-265 - Improved code comment

SONATA-265 - Improved delivery documentation and added interfaces

Typo

Removed usage of interfaces

Removed interface usage

Normalized "return" statement
Merge pull request #150 from sylvaindeloux/develop

SONATA-459 - Updated stepper active color
Merge pull request #138 from xavismeh/documentation

Improved documentation
Fixed titles display