Load selected feed after a short timeout

Avoid firing multiple server requests if the user is navigating up/down
the tree list with the keyboard. Instead, wait till the user has stopped
navigating for at least 250ms.
adding Korean in the language list
.\locale\ko_KR\*
updating korean resources
Revert "updating korean resources"

This reverts commit 4444db8cc845ec398792c877aa7fe5748e9fcb25.
updating resources 1758
add ko resources

add ko resources
adding ko resources

test
adding only po
adding only mo
update 1826
commit from shell
Merge pull request #223 from mhaley/patches-viewfeed-timeout

Load selected feed after a short timeout
changing Korean terms and adding some more translations
changing wrong folder tree and updating some Korean translations
deleting files in wrong location
modifying some Korean translations
Merge pull request #227 from whyparkc/master

Pull request for localization for Korean
feedparser: check if initial xpath query for root element returns anything
fixes "undefined index" notice