2008-04-22  Murray Cumming  <murrayc@murrayc.com>

* examples/example_lesson_planner.glom:
* examples/Makefile.am: Added a new example, which uses a calendar.

* glom/mode_data/box_data_calendar_related.h
* glom/mode_data/box_data_calendar_related.cc:
fill_from_database(): Do one SQL query for the whole month and store 
the values.
on_calendar_details(): Show the stored values.
* glom/mode_data/box_data_list_related.cc:
* glom/mode_data/box_data_list_related.h: Removed get_fields_to_show() 
because it is in the base class.

svn path=/trunk/; revision=1582