ch. 9 finished 3rd exercise
Merge branch 'master' of https://github.com/juandefelix/sample_app into updating-users
completed ex. 5 in chapter 9
completed ex 5 ch. 9
finished (almost) all the exercises in chapter 9
Merge pull request #2 from juandefelix/updating-users

Updating users. Adding code for some of the exercises of chapter 9