Merge pull request #5 from AntonKolmakov/week4

Week4
Merge pull request #6 from AntonKolmakov/week5

Week5
Merge pull request #7 from AntonKolmakov/week5

Week5
Merge pull request #8 from AntonKolmakov/week5

-thin
add .env to .gitignore
use unicorn via procfile
Use Mailgun to send out emails
fix the invitation
Merge branch 'master' of github.com:AntonKolmakov/myflix