Add missing translations in SINGLE_USER_MODE

In SINGLE_USER_MODE, some strings were untranslated.
For instance "Loading, please wait..." and all strings in the "Actions" Menu ("Preferences...", "Search..." and so on)
Merge pull request #314 from aedrin/patch-1

Add missing translations in SINGLE_USER_MODE
add context menu for cdmFeedTitle; change mark as read prompt for grouped headlines more clear
Merge branch 'master' of github.com:gothfox/Tiny-Tiny-RSS
Updated german translation
Merge pull request #321 from HeikoAdams/master

Updated german translation
printTagSelect: work correctly on tags with spaces
Merge branch 'master' of github.com:gothfox/Tiny-Tiny-RSS
catchup group: deselect everything before processing
enclose floating elements in public feeds

http://tt-rss.org/forum/viewtopic.php?f=10&t=2670&p=15780#p15780
Merge pull request #323 from levito/patch-6

enclose floating elements in public feeds
do not unpack all visible headlines in collapsed mode because those are unpacked on expand
add af_fsckportal
only try to set fucking cookie jar if open_basedir restriction is not in effect
Merge remote-tracking branch 'upstream/master'

Conflicts:
	locale/de_DE/LC_MESSAGES/messages.mo
	locale/de_DE/LC_MESSAGES/messages.po