Runs migrations in transcations.
That means that if a migration failes, it will be safely rolled back.
Tries to return helpful error messages.
Stores migration version details in table schema_migrations.
This table will be auto-generated.
Usage
migrate -url mysql://user@tcp(host:port)/database -path ./db/migrations create add_field_to_table
migrate -url mysql://user@tcp(host:port)/database -path ./db/migrations up
migrate help # for more info