modified:   ../.gitignore
	deleted:    bdah_demo_1_org.png
	deleted:    bdah_demo_1a.png
	deleted:    goal_3.png
	deleted:    rstudio_install.png
	deleted:    rstudio_panels_1.png
	deleted:    visualisation.Rpres
	new file:   workshop4_shiny.Rmd
	modified:   workshop4_visualisation.Rmd
- added shiny document.
- almost done with visualisation part. left to add video and go over for
  mistakes.