Added the JsonFormatWriter/Reader
diff --git a/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj b/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
index 39b4026..199e410 100644
--- a/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
+++ b/src/ProtocolBuffers.Test/ProtocolBuffers.Test.csproj
@@ -77,6 +77,7 @@
     <Compile Include="Collections\PopsicleListTest.cs" />

     <Compile Include="CompatTests\BinaryCompatibilityTests.cs" />

     <Compile Include="CompatTests\CompatibilityTests.cs" />

+    <Compile Include="CompatTests\JsonCompatibilityTests.cs" />

     <Compile Include="CompatTests\TestResources.Designer.cs">

       <AutoGen>True</AutoGen>

       <DesignTime>True</DesignTime>

@@ -115,6 +116,7 @@
     <Compile Include="TestProtos\UnitTestXmlSerializerTestProtoFile.cs" />

     <Compile Include="TestRpcGenerator.cs" />

     <Compile Include="TestUtil.cs" />

+    <Compile Include="TestWriterFormatJson.cs" />

     <Compile Include="TestWriterFormatXml.cs" />

     <Compile Include="TextFormatTest.cs" />

     <Compile Include="UnknownFieldSetTest.cs" />