Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Calendar/MainPage.xaml

@@ -2,13 +2,11 @@
     x:Class="Wino.Calendar.MainPage"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-    xmlns:local="using:Wino.Calendar"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:local="using:Wino.Calendar"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-    mc:Ignorable="d"
-    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
+    mc:Ignorable="d">
 
-    <Grid>
-
-    </Grid>
+    <Grid />
 </Page>