Merge pull request #104 from jukra/master

Update presentations.md
Lecture 7 task 1-2.
Lecture 8 task 1.
Lecture 8 task 2.
Merge pull request #105 from Oona/master

Lecture 7 task 1-2.
jsinspect
Lecture 8 link to 'Issues for adding automated testing'.
Update assignment links
Merge pull request #106 from Oona/master

Lecture 8 link to 'Issues for adding automated testing'.
Merge pull request #107 from tariel/master

Update assignment links
@Oona found alanshaw/david-www
A word of clarification
Lecture 9, task 2.
Merge pull request #108 from HeikkiAlanen/master

Lecture 9, task 2.
Lecture 9 task 2.
Merge pull request #109 from Oona/master

Lecture 9 task 2.
Link to security
Merge branch 'master' of github.com:paazmaya/modern-web-tools-with-node-js-book
Lecture 9, tasks 1-3
Links and formatting