Merge pull request #1385 from metabase/driver-refactor

...tend/src/admin/databases/components/DatabaseEditForms.jsx

frontend/src/admin/databases/components/DatabaseList.jsx

frontend/src/admin/databases/databases.controllers.js

frontend/src/components/database/DatabaseDetailsForm.jsx

frontend/src/lib/core.js

frontend/src/metabase/metabase.services.js

frontend/src/setup/components/DatabaseStep.jsx

src/metabase/api/database.clj

src/metabase/api/setup.clj

src/metabase/driver.clj

src/metabase/driver/generic_sql.clj

src/metabase/driver/generic_sql/interface.clj

src/metabase/driver/generic_sql/native.clj

src/metabase/driver/generic_sql/query_processor.clj

src/metabase/driver/generic_sql/util.clj

src/metabase/driver/h2.clj

src/metabase/driver/interface.clj

src/metabase/driver/mongo.clj

src/metabase/driver/mongo/query_processor.clj

src/metabase/driver/mysql.clj