renamed:    Shiny_create.png -> img/Shiny_create.png
	renamed:    Shiny_successa.png -> img/Shiny_successa.png
	renamed:    bdah_demo_1.png -> img/bdah_demo_1.png
	renamed:    goal_1.png -> img/goal_1.png
	renamed:    goal_2.png -> img/goal_2.png
	renamed:    goal_3a.png -> img/goal_3a.png
	renamed:    rstudio_installa.png -> img/rstudio_installa.png
	renamed:    rstudio_panelsa.png -> img/rstudio_panelsa.png
	renamed:    visualisation.Rmd -> workshop4_visualisation.Rmd
- Visualisation file renamed.
- all offline and online images stored in img/