Merge branch 'ice-cream-sandwich' into yota2

Author: geometer

ChangeLog

@@ -12,7 +12,7 @@
 * Better implementation of brighthess levels
 * Minor issues in book sync
 
-===== 2.5.6 (Aug 20, 2015) =====
+===== 2.5.6 (Aug 25, 2015) =====
 * New (material design style) icon
 * More brighthess levels in reading mode