Updated Spanish translation
try to improve color guessing algorithm a bit

Conflicts:
	include/colors.php
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

Conflicts:
	include/colors.php
use hashed guids in a hopefully backwards compatible fashion
Polish translation update.
format_article_labels: bail out if passed something other than array
remove js-based player, better mp3 support detection for html5 audio
mail plugin: fix blank From: header
unify SMTP_HOST and SMTP_PORT as SMTP_SERVER
add SPHINX_SERVER
ttrssMailer: fix typo
ttrssMailer: actually use OOP properly
experimental SQL-based error logger

Conflicts:
	include/functions.php