Migration Table add "sql" VARCHAR col (traceability)

[nmccready]

So currently the migrations table has id, name, and run_on as columns. I am proposing to either add a sql column to actually save off what has run for traceability.

Granted this is pumped to stdout and could just be utilized in your CI architecture.

Even if this is not accepted would it be possible to make createMigrationsTable's options more flexible so that custom columns could be added more easily.

Seems hardcoded here

[nmccready]

Another argument for this is for use cases when a manual migration must be run. Thus, again losing traceability of what has exactly run.

For example, what if the name was identical for the run but it was not run off the master branch but a feature.