add fable stuff to nuget package

Author: Larocceau

src/Client/SAFE.Client.Utils.fsproj

@@ -34,5 +34,9 @@
   <ItemGroup>
     <Compile Include="SAFE.fs" />
   </ItemGroup>
+
+  <ItemGroup> 
+          <Content Include="*.fsproj; **\*.fs; **\*.fsi" PackagePath="fable\" />
+  </ItemGroup>
   <Import Project="..\..\.paket\Paket.Restore.targets" />
 </Project>