5.0.0

This is a major release coming with new features and lots of changes, only one of which is breaking (and minor). Please read the documentation carefully, in particular the chapter about upgrading.

Here is a summary of the changes:

• Feature: data can be imported along with child records, for example data and images with sys_file_reference relations. For handling images during import, some example user functions are provided.
• Feature: new properties are available for handling denormalized external sources in a much clearer way than before
• Small feature: parameters can be added for custom steps when declaring them
• Big change: the external configuration that used to go in the ctrl section of the TCA now stands in its own "namespace" in the TCA.
• Big change: the additionalFields property is also in its own TCA "namespace" and gains the transformation properties of normal columns
• Change: the userFunc property is renamed to userFunction and its params sub-property is renamed to parameters
• Change: when both inserts and updates are disabled, External Import will now delete records that would have been deleted if updates were allowed (this is really a bugfix, but it's an important change in behavior)
• Change: the MM property, which caused much confusion, is deprecated

Thanks to all the sponsors who made this release possible: Idéative, Bendoo, merhwert, Benni Mack and Tomas Norre.