Updating json files to pin versions and build.cmd to pin KoreBuild and DNX

Author: pranavkm

build.cmd

@@ -16,11 +16,19 @@ copy %CACHED_NUGET% .nuget\nuget.exe > nul
 
 :restore
 IF EXIST packages\KoreBuild goto run
-.nuget\NuGet.exe install KoreBuild -ExcludeVersion -o packages -nocache -pre
+IF DEFINED BUILDCMD_RELEASE (
+    .nuget\NuGet.exe install KoreBuild -version 0.2.1-%BUILDCMD_RELEASE% -ExcludeVersion -o packages -nocache -pre
+) ELSE (
+    .nuget\NuGet.exe install KoreBuild -ExcludeVersion -o packages -nocache -pre
+)
 .nuget\NuGet.exe install Sake -version 0.2 -o packages -ExcludeVersion
 
 IF "%SKIP_DNX_INSTALL%"=="1" goto run
-CALL packages\KoreBuild\build\dnvm upgrade -runtime CLR -arch x86
+IF DEFINED BUILDCMD_RELEASE (
+    CALL packages\KoreBuild\build\dnvm install 1.0.0-%BUILDCMD_RELEASE% -runtime CLR -arch x86 -a default
+) ELSE (
+    CALL packages\KoreBuild\build\dnvm upgrade -runtime CLR -arch x86 
+)
 CALL packages\KoreBuild\build\dnvm install default -runtime CoreCLR -arch x86
 
 :run

src/EntityFramework.Commands/project.json

@@ -1,11 +1,11 @@
 {
-  "version": "7.0.0-*",
+  "version": "7.0.0-beta5",
   "description": "Command line utilities for Entity Framework.",
   "compilationOptions": {
     "warningsAsErrors": true
   },
   "dependencies": {
-    "EntityFramework.Relational.Design": "7.0.0-*",
+    "EntityFramework.Relational.Design": "7.0.0-beta5",
   },
   "compile": "..\\Shared\\*.cs",
   "exclude": "tools\\Handlers.cs",
@@ -16,14 +16,14 @@
     "net45": { },
     "dnx451": {
       "dependencies": {
-        "Microsoft.AspNet.Hosting": "1.0.0-*",
-        "Microsoft.Framework.CommandLineUtils.Sources": { "version": "1.0.0-*", "type": "build" }
+        "Microsoft.AspNet.Hosting": "1.0.0-beta5",
+        "Microsoft.Framework.CommandLineUtils.Sources": { "version": "1.0.0-beta5", "type": "build" }
       }
     },
     "dnxcore50": {
       "dependencies": {
-        "Microsoft.AspNet.Hosting": "1.0.0-*",
-        "Microsoft.Framework.CommandLineUtils.Sources": { "version": "1.0.0-*", "type": "build" }
+        "Microsoft.AspNet.Hosting": "1.0.0-beta5",
+        "Microsoft.Framework.CommandLineUtils.Sources": { "version": "1.0.0-beta5", "type": "build" }
       }
     },
     "netcore50": {