Addin: Include all dependent assemblies in VSIX

Otherwise, ILSpy will fail to start if it isn't already running.
This bloats the VSIX to nearly 6MB, but there is no alternative.

ILSpy.AddIn/ILSpy.AddIn.csproj

@@ -189,10 +189,46 @@
     <Content Include="Resources\Package.ico" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\AvalonEdit\ICSharpCode.AvalonEdit\ICSharpCode.AvalonEdit.csproj">
+      <Project>{6c55b776-26d4-4db3-a6ab-87e783b2f3d1}</Project>
+      <Name>ICSharpCode.AvalonEdit</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\ICSharpCode.Decompiler\ICSharpCode.Decompiler.csproj">
+      <Project>{984cc812-9470-4a13-aff9-cc44068d666c}</Project>
+      <Name>ICSharpCode.Decompiler</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\ILSpy.BamlDecompiler\ILSpy.BamlDecompiler.csproj">
+      <Project>{a6bad2ba-76ba-461c-8b6d-418607591247}</Project>
+      <Name>ILSpy.BamlDecompiler</Name>
+    </ProjectReference>
     <ProjectReference Include="..\ILSpy\ILSpy.csproj">
       <Project>{1e85eff9-e370-4683-83e4-8a3d063ff791}</Project>
       <Name>ILSpy</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Mono.Cecil\Mono.Cecil.csproj">
+      <Project>{d68133bd-1e63-496e-9ede-4fbdbf77b486}</Project>
+      <Name>Mono.Cecil</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Mono.Cecil\symbols\pdb\Mono.Cecil.Pdb.csproj">
+      <Project>{63e6915c-7ea4-4d76-ab28-0d7191eea626}</Project>
+      <Name>Mono.Cecil.Pdb</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\NRefactory\ICSharpCode.NRefactory.CSharp\ICSharpCode.NRefactory.CSharp.csproj">
+      <Project>{53dca265-3c3c-42f9-b647-f72ba678122b}</Project>
+      <Name>ICSharpCode.NRefactory.CSharp</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\NRefactory\ICSharpCode.NRefactory.VB\ICSharpCode.NRefactory.VB.csproj">
+      <Project>{7b82b671-419f-45f4-b778-d9286f996efa}</Project>
+      <Name>ICSharpCode.NRefactory.VB</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\NRefactory\ICSharpCode.NRefactory\ICSharpCode.NRefactory.csproj">
+      <Project>{3b2a5653-ec97-4001-bb9b-d90f1af2c371}</Project>
+      <Name>ICSharpCode.NRefactory</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\SharpTreeView\ICSharpCode.TreeView.csproj">
+      <Project>{dde2a481-8271-4eac-a330-8fa6a38d13d1}</Project>
+      <Name>ICSharpCode.TreeView</Name>
+    </ProjectReference>
   </ItemGroup>
   <PropertyGroup>
     <UseCodebase>true</UseCodebase>