Correct project dependencies

- use latest `System.Net.Http`, not hard-coded version
- add imports for the latest CLI
 - see aspnet/FileSystem@4a9a0fd for the inspiration

samples/AntiforgerySample/project.json

@@ -9,6 +9,7 @@
     "Microsoft.AspNetCore.Routing.Extensions": "1.0.0-*",
     "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-*",
     "Microsoft.AspNetCore.StaticFiles": "1.0.0-*",
+    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "Newtonsoft.Json": "7.0.1"
   },
 
@@ -22,7 +23,9 @@
 
   "frameworks": {
     "dnx451": { },
-    "dnxcore50": { }
+    "dnxcore50": {
+      "imports": "portable-net451+win8"
+    }
   },
 
   "publishExclude": [

test/Microsoft.AspNetCore.Antiforgery.FunctionalTests/project.json

@@ -2,7 +2,8 @@
   "dependencies": {
     "AntiforgerySample": "1.0.0-*",
     "Microsoft.AspNetCore.TestHost": "1.0.0-*",
-    "Microsoft.AspNetCore.Testing": "1.0.0-*"
+    "Microsoft.AspNetCore.Testing": "1.0.0-*",
+    "Microsoft.NETCore.Platforms": "1.0.1-*"
   },
   "testRunner": "xunit",
   "commands": {
@@ -12,15 +13,19 @@
     "dnx451": {
       "dependencies": {
         "Moq": "4.2.1312.1622",
-        "System.Net.Http": "4.0.1-rc2-23621",
         "xunit.runner.console": "2.1.0"
+      },
+      "frameworkAssemblies": {
+        "System.Net.Http": ""
       }
     },
     "dnxcore50": {
       "dependencies": {
         "moq.netcore": "4.4.0-beta8",
+        "System.Net.Http": "4.0.1-*",
         "xunit.runner.aspnet": "2.0.0-aspnet-*"
-      }
+      },
+      "imports": "portable-net451+win8"
     }
   }
 }

test/Microsoft.AspNetCore.Antiforgery.Test/project.json

@@ -8,6 +8,7 @@
     "Microsoft.AspNetCore.Http": "1.0.0-*",
     "Microsoft.Extensions.DependencyInjection": "1.0.0-*",
     "Microsoft.Extensions.WebEncoders": "1.0.0-*",
+    "Microsoft.NETCore.Platforms": "1.0.1-*",
     "xunit": "2.1.0-*"
   },
   "testRunner": "xunit",
@@ -28,7 +29,8 @@
       "dependencies": {
         "moq.netcore": "4.4.0-beta8",
         "xunit.runner.aspnet": "2.0.0-aspnet-*"
-      }
+      },
+      "imports": "portable-net451+win8"
     }
   }
 }