Navbars and headers corrections
Events datafixtures
Event index templates
Event index js
Event index - Controllers and repositories edits
Bug corrections

- Correct missing router error in console for AJAX call
- Correct appartion of brand logo in collapsed navbar
Event index less
Event utilities, datafixtures edit
Events : new icons
Event show template
Undo background size change

Change caused bad display on xs-screens (on welcome page)
Twig extensions
Icons
Events 1.1 - Templates
Events 1.1 - js
Events 1.1 - Less
Events 1.1 - Entities
Events 1.1 - Controller
Events 1.1 - Datafixtures
Small design changes