Adding universe build target for init-release

Creates release branch and updates NuGet.config as appropriate

build-template/NuGet.Config

@@ -4,10 +4,4 @@
     <add key="AspNetVNext" value="https://www.myget.org/F/aspnetvnext/api/v2" />
     <add key="NuGet.org" value="https://nuget.org/api/v2/" />
   </packageSources>
-  <packageSourceCredentials>
-    <AspNetVNext>
-      <add key="Username" value="aspnetreadonly" />
-      <add key="ClearTextPassword" value="4d8a2d9c-7b80-4162-9978-47e918c9658c" />
-    </AspNetVNext>
-  </packageSourceCredentials>
-</configuration>
+</configuration>

makefile.shade

@@ -121,6 +121,33 @@ var repos='${new Dictionary<string,string> {
         }
     }
 
+#init-release
+    var templatePath = '${Path.Combine(BASE_DIR, "build-template")}'
+    var fileName = 'NuGet.Config'
+    for each='var repo in repos'
+        var targetFile = '${Path.Combine(Directory.GetCurrentDirectory(), repo.Key, fileName)}'
+        var sourceFile = '${Path.Combine(Directory.GetCurrentDirectory(), templatePath, fileName)}'
+        var gitFolder = '${repo.Key}'
+
+        -// get latest dev and create new release
+        git gitCommand='checkout dev'
+        git gitCommand='pull origin dev'
+        git gitCommand='checkout -b release dev'
+
+        -// alter and commit release NuGet.Config
+        -File.Copy(sourceFile, targetFile, true);
+        update-file updateFile="${targetFile}"
+            -updateText = updateText.Replace("/F/aspnetvnext/", "/F/aspnetrelease/");
+        git gitCommand='add NuGet.Config'
+        git gitCommand='commit -m "Updating release Nuget.config"'
+
+        -// alter dev NuGet.Config and phantom merge release branch
+        git gitCommand='checkout dev'
+        git gitCommand='merge release'
+        -File.Copy(sourceFile, targetFile, true);
+        git gitCommand='add NuGet.Config'
+        git gitCommand='commit -m "Updating dev Nuget.config"'
+
 #only-compile target='compile'
     @{
         var failed = new Dictionary<string, Exception>();