Updated Spanish translation
Merge pull request #156 from Menti/master

Updated Spanish translation
try to improve color guessing algorithm a bit
Merge branch 'master' of github.com:gothfox/Tiny-Tiny-RSS
remove hsl stuff from classes/feeds, we take care of this when choosing the color
make gradient less visible on read headlines
properly remove and replace favicon color when favicon gets manually removed/uploaded
use hashed guids in a hopefully backwards compatible fashion