CVS commit by osterfeld: 

Expiry support added.
atm, akregator checks for expired articles at startup.
A default expiry can be set globally in the config dialog, it can be overridden by custom 
feed settings.  


  M +10 -0     akregator.kcfg   1.17
  M +33 -5     akregator_view.cpp   1.126
  M +3 -1      akregator_view.h   1.53
  M +56 -3     feed.cpp   1.42
  M +10 -5     feed.h   1.26
  M +0 -1      feedscollection.h   1.4
  M +44 -0     propertiesdialog.cpp   1.9
  M +5 -1      propertiesdialog.h   1.7
  M +145 -69   propertieswidgetbase.ui   1.10
  M +92 -9     settings_general.ui   1.10