** Confirm the migration works **
1. `git checkout master`
2. Build the app from xcode
3. Connect to the SQLite database and confirm there is no `pinned_count` column
4. `git checkout pinned_messages`
5. Rebuild the app from xcode without deleting it
6. Connect to the SQLite database and confirm the existence of a `pinned_count` column
** Confirm the schema works **
1. `git checkout pinned_messages`
2. Build the app from xcode
3. Connect to the SQLite database and confirm the existence of a `pinned_count` column