added a roku icon

MediaBrowser.WebDashboard/MediaBrowser.WebDashboard.csproj

@@ -93,6 +93,9 @@
     <Content Include="dashboard-ui\css\images\clients\mbc.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="dashboard-ui\css\images\clients\roku.jpg">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="dashboard-ui\css\images\fresh.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>