read header font from config

frontend/document/credocument.lua

@@ -80,6 +80,7 @@ CreDocument = Document:new{
 
 	line_space_percent = 100,
 	default_font = "Droid Sans Fallback",
+	header_font = "Droid Sans Fallback",
 	options = CreOptions,
 	configurable = Configurable,
 }
@@ -120,6 +121,11 @@ function CreDocument:engineInit()
 			self.default_font = default_font
 		end
 
+		local header_font = G_reader_settings:readSetting("header_font")
+		if header_font then
+			self.header_font = header_font
+		end
+
 		engine_initilized = true
 	end
 end
@@ -253,6 +259,12 @@ function CreDocument:setViewMode(new_mode)
 	end
 end
 
+function CreDocument:setHeaderFont(new_font)
+	if new_font then
+		self._document:setHeaderFont(new_font)
+	end
+end
+
 function CreDocument:zoomFont(delta)
 	self._document:zoomFont(delta)
 end

frontend/ui/reader/readerfont.lua

@@ -57,6 +57,12 @@ function ReaderFont:onReadSettings(config)
 	end
 	self.ui.document:setFontFace(self.font_face)
 
+	self.header_font_face = config:readSetting("header_font_face")
+	if not self.header_font_face then 
+		self.header_font_face = self.ui.document.header_font
+	end
+	self.ui.document:setHeaderFont(self.header_font_face)
+
 	self.font_size = config:readSetting("font_size")
 	if not self.font_size then 
 		--@TODO change this!  12.01 2013 (houqp)