Minor improvements

- ignore launchSettings.json files
- fix test project's `%(HintPath)' metadata for Facebook assembly
- disable shadow copy in all xUnit tests

Author: dougbu

.gitignore

@@ -17,4 +17,5 @@ _[Ss]cripts
 *.orig
 *.sln.ide
 .vs/
-project.lock.json
+project.lock.json
+*launchSettings.json

test/Microsoft.AspNet.Facebook.Test/Microsoft.AspNet.Facebook.Test.csproj

@@ -18,7 +18,7 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="Facebook, Version=6.0.10.0, Culture=neutral, PublicKeyToken=58cb4f2111d1e6de, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\Facebook.6.1.4\lib\net45\Facebook.dll</HintPath>
+      <HintPath>..\..\packages\Facebook.6.4.2\lib\net45\Facebook.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="Moq, Version=4.5.21.0, Culture=neutral, PublicKeyToken=69f491c39445e920, processorArchitecture=MSIL">

test/Microsoft.TestCommon/xunit.runner.json

@@ -1,4 +1,5 @@
 {
   "appDomain": "denied",
-  "preEnumerateTheories": false
+  "preEnumerateTheories": false,
+  "shadowCopy":  false
 }