add LICENSE file, update nuspec file to meet official nuget package requirement

Azure.IoT.Edge.Function.nuspec

@@ -4,12 +4,14 @@
     <id>Azure.IoT.Edge.Function</id>
     <version>0.0.1</version>
     <title>Azure IoT Edge Function</title>
-    <authors>VS China IoT Tooling</authors>
-    <owners>VS China IoT Tooling (vschinaiot@microsoft.com)</owners>
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <authors>Microsoft</authors>
+    <owners>microsoft, nugetazureiotedge</owners>
     <description>Scaffolding tool to setup azure iot edge function development environment.</description>
-    <releaseNotes>First release</releaseNotes>
-    <copyright>Copyright 2016</copyright>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <language>en-US</language>
+    <projectUrl>http://github.com/azure/dotnet-template-azure-iot-edge-function/</projectUrl>
+    <licenseUrl>https://github.com/Azure/dotnet-template-azure-iot-edge-function/blob/master/license</licenseUrl>
+    <copyright>© Microsoft Corporation. All rights reserved.</copyright>
     <tags>azure iot edge dotnet template</tags>
     </metadata>
     <files>

LICENSE

@@ -1,6 +1,8 @@
-    MIT License
+The MIT License (MIT)
 
-    Copyright (c) Microsoft Corporation. All rights reserved.
+Copyright (c) .NET Foundation and Contributors
+
+All rights reserved.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -18,4 +20,4 @@
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-    SOFTWARE
+SOFTWARE.

README.md

@@ -13,7 +13,7 @@ This ReadMe consists of two parts:
 
 Make sure you have [.NET Core SDK](https://www.microsoft.com/net/core#windowscmd) and [Nuget](https://www.nuget.org/) installed.
 
-Run following command to add the nuget source:
+Config the nuget source:
 
 - For NuGet V3
 ```
@@ -21,7 +21,6 @@ nuget sources add -name AzureIoTEdgeFunction -source https://www.myget.org/F/dot
 ```
 
 - For NuGet V2
-
 ```
 nuget sources add -name AzureIoTEdgeFunction -source https://www.myget.org/F/dotnet-template-azure-iot-edge-function/api/v2
 ```