2.3.7:

* Gtk:
  - Action:
    - create_tool_item(), create_menu(), and create_icon() return specific types.
      (Bryan Forbes)
    - Constructors: Give 0 instead of "" to GTK+ for empty strings, to make 
      stock items work. (Murray Cumming)
  - Container: Keep managed child widgets alive when remove()ing them.
    (Murray Cumming)
  - IconTheme: Wrapped the changed signal. (Murray Cumming)
  - FileFilter: It's a Gtk::Object, not a Glib::Object. (Murray Cumming) 
  - TreeView: Added move_column_to_start(). (Andrew E. Makeev)
  - UIManager: Fixed typo in disconnect_proxy signal name. (Bryan Forbes)
  - many: Do the extra reference for several get_*() methods.
    (Bryan Forbes, Murray Cumming) 


* Documentation:
  - Reference documentation: Corrected some mention of null parameters, and g_free(), 
    in generated-from-C docs. (Murray Cumming)
  - Book: Corrected typos and updated libsigc++ syntax. (Elijah Newren)
  - FAQ: Don't mention gtkmm 1.2 so much. (Elijah Newren)
  - Examples: Adde book/menus_and_toolbars, to show UIManager. (Murray Cumming)