Implemented line charts and stacked area charts for statistics widgets. Users will now be able to chose from different chart types in the widget settings; chart settings will be saved now.
Excluded IE8 in dependency check for nvd3.
Added translations for stacked area charts.
Fixed bug#10258 - yellow color for UnreadArticles.
Changed DF names to avoid collides if process is currently present.
Merge remote-tracking branch 'upstream/master'