Merge pull request prometheus-net#45 from Axinom/fix-tester-missing-assemblyredirect

tester protobuf-net downgraded to match the rest

Author: andrasm

tester/packages.config

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="protobuf-net" version="2.1.0" targetFramework="net45" />
+  <package id="protobuf-net" version="2.0.0.668" targetFramework="net45" />
   <package id="System.Reactive" version="3.1.1" targetFramework="net45" />
   <package id="System.Reactive.Core" version="3.1.1" targetFramework="net45" />
   <package id="System.Reactive.Interfaces" version="3.1.1" targetFramework="net45" />

tester/tester.csproj

@@ -33,8 +33,8 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="protobuf-net, Version=2.1.0.0, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
-      <HintPath>..\packages\protobuf-net.2.1.0\lib\net45\protobuf-net.dll</HintPath>
+    <Reference Include="protobuf-net, Version=2.0.0.668, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+      <HintPath>..\packages\protobuf-net.2.0.0.668\lib\net40\protobuf-net.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System" />