Fixed links (PDF was incomplete and second link was broken). Added detail on...

Fixed links (PDF was incomplete and second link was broken). Added detail on which sections will be covered.

README.md

@@ -6,11 +6,13 @@
 
 14:30 - 15:30 R refresher (Thea van Rossum)
 
-https://git.embl.de/klaus/tidyverse_R_intro/blob/master/R-lab.pdf
+https://www.huber.embl.de/users/klaus/tidyverse_R_intro/R-lab.html
+Covering: sections 1-5, 6.1, 6.4
 
 16:00 - 18:00 Data preprocessing  (Thea van Rossum)
 
-https://www.huber.embl.de/users/klaus/graphics_and_data_handling/graphics_and_data_handling.htm (parts from this)
+https://www.huber.embl.de/users/klaus/graphics_and_data_handling/graphics_and_data_handling.html
+Covering: section 10
 
 18:00 - 19:00 Dinner (Canteen)