Differences between 0.2 and 0.3

Migrator differences

:sql migrator files can now be either .sql or .edn. See here for details.
.sql files now needs a marker --;; between different SQL statements. For more details see here
For :jdbc migrators a newer version of org.clojure/java.jdbc is used, and many functions has been moved to the clojure.java.jdbc.deprecated namespace.

Joplin configuration is no longer located in the project.clj file. Instead your code is responsible for providing the Joplin configuration map. See the example project on how to do this.
The joplin leiningen plugin has been removed, similar functionality can be achieved using lein aliases. See the example project for details.
The reset-db multimethod is removed.
The rollback-db multimethod now takes on more required argument (a number of a string of the ID to rollback to)
The create-migration multimethod now takes on more required argument (the name of the migration).
For SQL/JDBC migrators, the name of the migration table can now be set with the :migrations-table key in the :databases map.
Joplin now supports specifying ragtimes conflict strategies when migrating.

Joplin 0.3 depends on ragtime 0.5, which contains some breaking changes.

The main protocol that describes a datastore is now called 'DataStore' (was 'Migratable') and is located in the ragtime.protocols namespace.