added lab1 resources
lab1/README.md guiding notes updated
lab1/README.md guiding notes updated
udpated lab2/README.md guiding notes, lab2/Example2/build.xml and added some resources to lab3
updated lab3/README.md guiding notes, slides, images
Merge remote-tracking branch 'upstream/master'
initial material for Lab4
updated lab4 guide and examples
updated lab4
updated pictures
 updated lab3 resources
updated pictures
added example 7
updated guide to the lab session
final lab guide, without Dozer
Merge remote-tracking branch 'upstream/master'
Added solution to exercise 0.