A new task to set migration to a certain version

It would be nice to have a task which you could tell to set to the proper version. If the migrations_version table did not exist yet, it would create the table and set the version.

Explanation:
Most times migrations come as an after thought after the code db is already pushed live. Therefore you have to manually create the migrations table and set it to a version just before the newest migration.

It might also be better to just update the migrate task to check if a migration_version table exists, if not to just run the single migration which is specified.