Updated Greek translation
Added Indonesian translation
ItemView: Use the Id if the Item doesn't have any links
Let the runtime take care of threading

Use the task capabilities that the runtime gives
us instead of reinenting them poorly
An easier way to check for duplicate channel entries
Use a Dictionary for the theme variables
FeedUpdater: remove unused function

While in the area, make sure to use the right exception when in the
filter catch.
ChannelList: don't bother with Glib.Idle for filling data

It's not an expensive operation and we can do it on the spot. While in
the area, remove an unused variable.
Don't use glade for the 'about' dialog
Add the MonoDevelop files
Port a couple of dialogs to stetic
Updated POTFILES.in
Updated Polish translation
Updated Spanish translation
Updated Slovenian translation
Updated Galician translations
Updated Czech translation
Updated Indonesian translation
Updated Lithuanian translation
Updated Russian translation