Migration: initial migration script
Migration: initial 2.5.1 data for sqlite and MySQL

No data for PG at 2.5.1 as it is impossible to deploy on PG for 2.5.1.
These errors are fixed later.  Most likely we could create dumps from
older version for PG migration testing.
Migration: notes on version migration setup and operations
Travis: use different dbname for testing

Prevents any potential conflict if you run this locally
Travis: run migration tests