add screen rotate support

frontend/ui/readerui.lua

@@ -43,6 +43,7 @@ function ReaderUI:init()
 	-- a view container (so it must be child #1!)
 	self[1] = ReaderView:new{
 		dialog = self.dialog,
+		dimen = self.dimen,
 		ui = self
 	}
 	-- rotation controller
@@ -114,6 +115,10 @@ function ReaderUI:init()
 	self:handleEvent(Event:new("SetDimensions", self.dimen))
 end
 
+function ReaderUI:onSetDimensions(dimen)
+	self.dimen = dimen
+end
+
 function ReaderUI:onClose()
 	DEBUG("closing reader")
 	if self.document then