first microposts tests finished. At 10.1.2
added associations
In DEPENDENT: DESTROY in chapter 10
populated the db with microposts
In Chapter 10.3
in chapter 10.3.2
need to copy 10.28
in listing 10.33
in chapter 10.3.3
in Chapter 10.3.4
Add user micropost
Merge pull request #3 from juandefelix/user-microposts

User microposts