Add German Translation

Add German Translation to Core and Defaultplugins

Plugins/Wox.Plugin.Color/Languages/de.xaml

@@ -0,0 +1,8 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:system="clr-namespace:System;assembly=mscorlib">
+
+    <system:String x:Key="wox_plugin_color_plugin_name">Farben</system:String>
+    <system:String x:Key="wox_plugin_color_plugin_description">Stellt eine HEX-Farben Vorschau bereit. (Versuche #000 in Wox)</system:String>
+    
+</ResourceDictionary>

Plugins/Wox.Plugin.Color/Wox.Plugin.Color.csproj

@@ -34,6 +34,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="PresentationCore" />
+    <Reference Include="PresentationFramework" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />
   </ItemGroup>
@@ -85,6 +86,13 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="Languages\de.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.