Update Tester to be a .NET Core App

  * Changed `Tester.csproj` to be a .NET Core app
  * Added `.vs` to `.gitignore`

This closes #1

Author: markusweimer

.gitignore

@@ -2,3 +2,4 @@
 *exe
 bin
 obj
+.vs/

Tester/Tester.csproj

@@ -1,44 +1,12 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{511BA459-F8F4-44EB-A94B-C0DC1463CD4A}</ProjectGuid>
     <OutputType>Exe</OutputType>
-    <RootNamespace>Tester</RootNamespace>
-    <AssemblyName>Tester</AssemblyName>
-    <TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug</OutputPath>
-    <DefineConstants>DEBUG;</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <ExternalConsole>true</ExternalConsole>
-    <PlatformTarget>x64</PlatformTarget>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release</OutputPath>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-    <ExternalConsole>true</ExternalConsole>
-  </PropertyGroup>
-  <ItemGroup>
-    <Reference Include="System" />
-  </ItemGroup>
-  <ItemGroup>
-    <Compile Include="Program.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
-  </ItemGroup>
+
   <ItemGroup>
-    <ProjectReference Include="..\TorchSharp\TorchSharp.csproj">
-      <Project>{E47E6785-B43B-49E9-A360-DB23B5E21C35}</Project>
-      <Name>TorchSharp</Name>
-    </ProjectReference>
+    <ProjectReference Include="..\TorchSharp\TorchSharp.csproj" />
   </ItemGroup>
-  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+
 </Project>