Lecture 7 task 1-2.

Hi Jukka,

Didn't combine tasks 1 and 2, so had to add here the link to task 2. If you want to see both commits:

https://github.com/Oona/hello-node-js/commit/33c22c5cd8e7c73d7aae89ca63b5d06cdcea71e7 (task 1)
https://github.com/Oona/hello-node-js/commit/f7c27f20f4e47a1d6c4e4d467d76580c14bcc6b6 (task 2)