Translations:New Template System in LS3.x/5/en

LimeSurvey 3 introduces a complete new theme engine system, based on Twig 1.29, Bootstrap, and allowing theme inheritance and theme options. It completely removes the old replacement keywords system. So now, 100% of the frontend HTML can be customized. For example, in the old theme system, there was a keyword {ASSESSMENTS} that was replaced by the assessment HTML at execution time. A theme designer had no way to customize this HTML (other than using JavaScript). Now, there is a file called assessments.twig that contains the logic (written in Twig) to generate this HTML. In these pages, we will give you some explanation about how to use this new theme engine.