Changes: document some of the new QML things

CHANGES

@@ -12,12 +12,22 @@ This release contains contributions from (alphabetically by first name):
  - Python job modules (such as *unpackfs* or *packages*) can now provide
    a `pretty_status_message()` function, like the existing `pretty_name()`
    function, that is used to update the status during install. #1330
+ - QML support-modules and objects are now registered into the io.calamares
+   namespace. This affects modules using Calamares models inside their
+   QML UI (at this point, very few). With this release, the necessary
+   `import` for Calamares parts looks like
+   > ```import io.calamares.ui 1.0```
 
 ## Modules ##
  - *packages* now reports more details in the installation progress-bar.
  - *netinstall* module supports and `expanded` key, which will pre-expand
    a group (as if the user had pressed the arrow-button in the tree-view).
    This only affects the UI.
+ - Modules that use QML need a new import line. The QML file for the
+   module is configured through new keys *qmlSearch* and *qmlFilename*
+   (previously those were without the `qml` prefix, which invites name
+   collisions). The full module identifier is also used as a filename,
+   so that multiple instances of a module can use different QML files.
 
 
 # 3.2.20 (2020-02-27) #