add comment and downgrade to 4.5, also remove packages

Author: steviegt6

ProjectStarlight.Interchange.csproj

@@ -9,11 +9,12 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ProjectStarlight.Interchange</RootNamespace>
     <AssemblyName>ProjectStarlight.Interchange</AssemblyName>
-    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <Deterministic>true</Deterministic>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
+    <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -33,6 +34,9 @@
     <WarningLevel>4</WarningLevel>
     <DocumentationFile>bin\Release\ProjectStarlight.Interchange.xml</DocumentationFile>
   </PropertyGroup>
+  <PropertyGroup>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="Microsoft.Xna.Framework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=842cf8be1de50553, processorArchitecture=x86">
       <SpecificVersion>False</SpecificVersion>
@@ -45,9 +49,6 @@
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />
-    <Reference Include="System.ValueTuple, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
-      <HintPath>packages\System.ValueTuple.4.5.0\lib\net47\System.ValueTuple.dll</HintPath>
-    </Reference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="TextureGIF.cs" />
@@ -56,8 +57,5 @@
     <Compile Include="Utilities\GIFBuilder.cs" />
   </ItemGroup>
   <ItemGroup />
-  <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>

Utilities/FrameUtilities.cs

@@ -4,6 +4,9 @@
 
 namespace ProjectStarlight.Interchange.Utilities
 {
+    /// <summary>
+    ///     Simple class providing small, useful methods for some common tasks.
+    /// </summary>
     public static class FrameUtilities
     {
         /// <summary>