Update README.md
Merge branch 'day1' of https://github.com/kstag07/Refactor-Site

Pulling day1
Merge pull request #13 from kstag07/day1

Add posts and devise authentication.
Add authorization with pundit.
Pre-adding role to user model with devise.
Add roles to users.
Merge pull request #20 from kstag07/tests

Tests
adding comment feature to posts