Alexander

What are those steps? Do you just run Apache Ant? If so, is the `checkdistrubution` step important? It seems that there are no jar files required to perform this step in the repo. Probably it's a non open source library mentioned in this issue.

I need to add new columns to some of the core tables. For development I use the 4.1.5-dev(latest master branch). Following these instructions I created new migration files but when I perform an upgrade or install my database changes aren't applied. To upgrade the adserver I follow these instructions, however I'm not sure that is the correct way to run migrations for developers. As for new install I managed to get my database updated by executing this script `scripts/upgrade/buildXmlCache.php`. It created a set of *.bin files which probably are required for installation. But it didn't help for the upgrade process. The database stays at the 623 version.