Include swiftshader folder in NuGet packages (#59)

* Include swiftshader folder and files in the NuGet packages

* Corrected destination of the swiftshader files

Author: merceyz

NuGet/cef.redist.nuspec

@@ -20,6 +20,7 @@
          https://groups.google.com/a/chromium.org/forum/#!topic/chromium-packagers/75J9Y1vIc_E
          http://www.magpcss.org/ceforum/viewtopic.php?f=6&t=12580
      -->
+    <file src="..\cef_binary_3.y.z_$CPlatform$\$Configuration$\swiftshader\*.dll" target="CEF\$Platform$\swiftshader" />
     <file src="..\cef_binary_3.y.z_$CPlatform$\$Configuration$\*.bin" target="CEF\$Platform$" />
     <file src="..\cef_binary_3.y.z_$CPlatform$\Resources\*.pak" target="CEF\"/>
 	<file src="..\cef_binary_3.y.z_$CPlatform$\Resources\icudtl.dat" target="CEF\"/>