Update README.md with clearer instructions
Change 'shell' code fences to 'bash' and make code blocks render correctly
Add table of contents and section about saving changes
Update README.md

Very important typo fix
Merge pull request #1 from dpassage/fix-bundler-typo

Update README.md
Add support for migrations and move 'posts' creation into migration
Merge branch 'master' of github.com:MissionBit/superwall
Merge branch 'master' of https://github.com/Missionbit/superwall