Add workflow to upload to nuget.org on release + add some examples to README

.github/workflows/release.yml

@@ -0,0 +1,39 @@
+name: New Version Release
+
+on: 
+  release:
+    types: [published]
+
+jobs:
+
+  build:
+
+    runs-on: windows-latest  
+
+    env:
+      Solution_Name: MpcNET    
+      Configuration: Release     
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    # Add MSBuild to the PATH: https://github.com/microsoft/setup-msbuild
+    - name: Setup MSBuild.exe
+      uses: microsoft/setup-msbuild@v1.0.2
+
+    # Restore the application 
+    - name: Restore the application
+      working-directory: ./Sources
+      run: |
+        msbuild $env:Solution_Name /t:Restore /p:Configuration=$env:Configuration
+
+    # Build package and upload to github packages
+    - name: Build package
+      working-directory: ./Sources
+      run: |
+        dotnet build $env:Solution_Name --configuration $env:Configuration
+        dotnet pack --configuration $env:Configuration -o ./
+        dotnet nuget push *.nupkg  --api-key ${{ secrets.NUGET_API }} --source "nuget.org"