Log Message:
Changes 2.20.3):
* Documentation: Added main page text at index.html.

Changes 2.20.2:
* Documentation: Strip out the gobject-introspection annotations, and use
  other improvements made to docextract_to_xml.py

Changes 2.20.1:
Gtk:
* RecentAction: Fix the constructor that takes a RecentManager.
* TreeRowReference::get_model(): Correct the reference counting.