add microcharts

Billing.Shared/Views/RankPage.xaml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ui:BillingPage xmlns="http://xamarin.com/schemas/2014/forms"
+                xmlns:r="clr-namespace:Billing.Languages"
+                xmlns:ui="clr-namespace:Billing.UI"
+                xmlns:v="clr-namespace:Billing.Views"
+                xmlns:chart="clr-namespace:Microcharts.Forms;assembly=Microcharts.Forms"
+                xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+                x:Class="Billing.Views.RankPage"
+                x:Name="rankPage"
+                x:DataType="v:RankPage"
+                BindingContext="{x:Reference rankPage}">
+    <chart:ChartView Chart="{Binding Chart}"/>
+</ui:BillingPage>