Add DOAP file for jhbuild installation
Add appdata file to use with Software later
Merge branch 'master' into chart-db
Show error message if DB chart could not be loaded
Add ag_app_buttoned_dialog() to ag-app.h
Add delete-event handler to AgWindow
Check if chart needs to be saved upon close action
Change return type of ag_window_list_item_activated_cb() to void

The signal itself defines its return type as GTK_TYPE_VOID
ag_window_save_action() now only saves if needed
ag_window_new_chart_action() goes to chart tab if chart was not correctly closed
ag_window_back_action() goes to list only if the chart is saved

The user is prompted if they actually want to save or discard
Add error checking to ag_window_can_close()