VS 2017 .csproj Migration

Due to the way VS test works (by injecting an executable entry point), the performance tests needed to be factored out. I also organized all of our existing tests better along the way.
Actual code changes to Dapper itself are very minor, only formatting and documentation fixes (which we need many more of).

The build.ps1 script is upated to work, but note that <frameworkAssemblies> is not working in .nuspec inside the packages in the new .csproj system. I consider this to be a blocker. Issue is here: NuGet/Home#4853

Dapper.Contrib/Dapper.Contrib.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <AssemblyName>Dapper.Contrib</AssemblyName>
+    <PackageTags>orm;sql;micro-orm;dapper</PackageTags>
+    <Title>Dapper.Contrib</Title>
+    <Description>The official collection of get, insert, update and delete helpers for Dapper.net. Also handles lists of entities and optional "dirty" tracking of interface-based entities.</Description>
+    <Authors>Sam Saffron;Johan Danforth</Authors>
+    <TargetFrameworks>net40;net45;netstandard1.3</TargetFrameworks>
+    <!-- TODO: Docs -->
+    <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="..\Dapper\TypeExtensions.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Dapper\Dapper.csproj" />
+  </ItemGroup>
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net40' OR '$(TargetFramework)' == 'net45' ">
+    <Reference Include="System.Data" />
+    <Reference Include="System.Data.Linq" />
+    <Reference Include="System" />
+    <Reference Include="Microsoft.CSharp" />
+  </ItemGroup>
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
+    <PackageReference Include="Microsoft.CSharp" Version="4.3.0" />
+  </ItemGroup>
+</Project>

Dapper.EntityFramework/Dapper.EntityFramework.StrongName.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <AssemblyName>Dapper.EntityFramework.StrongName</AssemblyName>
+    <Title>Dapper: Entity Framework type handlers (with a strong name)</Title>
+    <Description>Extension handlers for entity framework</Description>
+    <Authors>Marc Gravell;Nick Craver</Authors>
+    <TargetFrameworks>net40;net45</TargetFrameworks>
+    <AssemblyOriginatorKeyFile>../Dapper.snk</AssemblyOriginatorKeyFile>
+    <SignAssembly>true</SignAssembly>
+    <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
+    <PackageId>Dapper.EntityFramework.StrongName</PackageId>
+    <PackageTags>orm;sql;micro-orm</PackageTags>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Dapper\Dapper.StrongName.csproj" />
+    <PackageReference Include="EntityFramework" Version="6.1.3" />
+    <PackageReference Include="Microsoft.SqlServer.Types" Version="11.0.2" />
+    <Reference Include="System.Configuration" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Data.Linq" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System" />
+    <Reference Include="Microsoft.CSharp" />
+  </ItemGroup>
+</Project>

Dapper.EntityFramework/Dapper.EntityFramework.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <AssemblyName>Dapper.EntityFramework</AssemblyName>
+    <Description>Extension handlers for entity framework</Description>
+    <AssemblyTitle>Dapper entity framework type handlers</AssemblyTitle>
+    <VersionPrefix>1.50.2</VersionPrefix>
+    <Authors>Marc Gravell;Nick Craver</Authors>
+    <TargetFrameworks>net40;net45</TargetFrameworks>
+    <PackageTags>orm;sql;micro-orm</PackageTags>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Dapper\Dapper.csproj" />
+    <PackageReference Include="EntityFramework" Version="6.1.3" />
+    <PackageReference Include="Microsoft.SqlServer.Types" Version="11.0.2" />
+    <Reference Include="System.Configuration" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Data.Linq" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System" />
+    <Reference Include="Microsoft.CSharp" />
+  </ItemGroup>
+</Project>