Link to slides from Tal Galili

See tweet: https://twitter.com/talgalili/status/484917338915893248
Link to slides from Jan de Leeuw

see tweet: https://twitter.com/jstatsoft/status/485183206879002625
Link to slides from David Smith

See tweet: https://twitter.com/revodavid/status/484483874336940032
Link to Jeff Allen's slides

See tweet: https://twitter.com/TrestleJeff/status/484567361790287872