Making ProjectDependenciesCommandResolver handle msbuild projects as well by using the ProjectFactory and IProject.

Moving the CommandResolution classes that depend on msbuild back into Cli.Utils.

Updating the src projects to a netstandard compatible with Cli.Utils moving to netstandard1.5

TestAssets/TestPackages/dotnet-invoke-portable/Program.cs

@@ -0,0 +1,27 @@
+using System;
+using System.IO;
+using Microsoft.DotNet.Cli.Utils;
+using NuGet.Frameworks;
+
+namespace ConsoleApplication
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            var environment = new EnvironmentProvider();
+            var packagedCommandSpecFactory = new PackagedCommandSpecFactory();
+
+            var projectDependenciesCommandFactory = new ProjectDependenciesCommandFactory(
+                FrameworkConstants.CommonFrameworks.NetCoreApp10,
+                "Debug",
+                null,
+                null,
+                Directory.GetCurrentDirectory());
+
+            var command = projectDependenciesCommandFactory.Create("dotnet-portable", null);
+
+            command.Execute();
+        }
+    }
+}

TestAssets/TestPackages/dotnet-invoke-portable/project.json

@@ -0,0 +1,22 @@
+{
+  "version": "1.0.0-rc-*",
+  "buildOptions": {
+    "emitEntryPoint": true
+  },
+  "dependencies": {
+    "Microsoft.DotNet.Cli.Utils": {
+      "target": "project"
+    },
+    "NuGet.Frameworks": "3.6.0-rc-1954"
+  },
+  "frameworks": {
+    "netcoreapp1.0": {
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.1"
+        }
+      }
+    }
+  }
+}