Faster Jpeg Huffman Decoding. (SixLabors#894)

* Read from underlying stream less often

* Update benchmark dependencies

* Experimental mango port

Currently broken

* Populate table, 64byte buffer

Still broken.

* Baseline, non RST works

* 15/19 baseline tests pass now.

* Optimize position change.

* 18/19 pass

* 19/19 baseline decoded

* Can now decode all images.

* Now faster and much cleaner.

* Cleanup

* Fix reader, update benchmarks

* Update dependencies

* Remove unused method

* No need to clean initial buffer

* Remove bounds check on ReadByte()

* Refactor from feedback

Author: JimBobSquarePants

src/ImageSharp.Drawing/ImageSharp.Drawing.csproj

@@ -39,7 +39,7 @@
     <AdditionalFiles Include="..\..\standards\stylecop.json" />
     <PackageReference Include="SixLabors.Fonts" Version="1.0.0-beta0008" />
     <PackageReference Include="SixLabors.Shapes" Version="1.0.0-beta0008" />
-    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-beta.61" PrivateAssets="All" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.1-rc.114" PrivateAssets="All" />
   </ItemGroup>
 
   <PropertyGroup>

tests/ImageSharp.Tests/ImageSharp.Tests.csproj

@@ -27,8 +27,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.9.2" />
-    <PackageReference Include="System.Drawing.Common" Version="4.5.0" />
+    <PackageReference Include="Magick.NET-Q16-AnyCPU" Version="7.12.0" />
+    <PackageReference Include="System.Drawing.Common" Version="4.5.1" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.console" Version="2.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />