min/max_version, mysql export

• Option to limit certain upgrade actions by the starting version
• Export module for MySql

Minor improvements

Regarding handling of failed upgrade schemas

A single important bugfix

There was a major problem with the creation of indexes and foreign keys in the newer json structure that was recently introduced.

Fixed a partially random failure in creating columns

0.2.3

v0.2.3

v0.2.2

Fixed a bug with support for the older schema format

v0.2.1

Minor bugfix for warning about a deprecation

v0.2.0

Better support for raw queries