Added four new sketch notes
links to sketchnotes
Andrea's changes
Added original sketch notes images
embedded new sketch notes
Added Toms slides
Added sketch of Liz talk
Added individual images taken from Tom's slides
Added links to slides for first 6:30 of Tom's talk

Also corrected a couple of typos.
Added more slides to Tom's talk

upto 22:00. Corrected typos as well.
Added slides to Andrea Provaglio's talk
Finished links to Andrea's talk

and fixed a couple of typos
Adding slides to Tom's talk
Completed Tom's slides

Need to check slides 57 and 58 - they don't appear to have correct
screenshots from the pdf.
Olaf's edits
Added several slide decks
Added images from darci, olaf an kasia

Not added to markdown yet
renamed darci jpg to fix link
Added slides to darci's talk
Added slides to olaf's talk