1.30.0 (stable):

* Dialog_FieldDefinition: Show self-triggering lookups as grayed-out.
  (Murray Cumming) Bug #754641 (m.rick.mac)
* Lookups: Prevent endless self lookups.
  (Murray Cumming)
* Use std::endl instead of std::cerr where std::endl was meant.
  (David Evans) Bug #754294
* Build: Disable use of yelp if --disable-documentation was used.
  This should apparently be useful on MacOS:
  https://trac.macports.org/ticket/44616
  (Murray Cumming)
* More use of C++11
  (Murray Cumming)
* EggSpreadTableDnd: Replace use of deprecated gtk_style_context_set_background.
  (Murray Cumming)
* Use property_whatever() instead of set_property("whatever").
  (Murray Cumming)
* ComboBox_Relationship: Fix a typo in a null check.
  (Murray Cumming)