add redirect from product_item if not found
Merge pull request #25 from kuljok/S3-description

Product page has been changed.
change user guide links
Merge remote-tracking branch 'origin/S3-description'

Conflicts:
	NetPing_modern.v12.suo
	NetPing_modern/bin/NetPing_modern.dll
	NetPing_modern/bin/NetPing_modern.pdb
	NetPing_modern/obj/Debug/NetPing_modern.dll
	NetPing_modern/obj/Debug/NetPing_modern.pdb
	NetPing_modern/obj/Release/NetPing_modern.dll
	NetPing_modern/obj/Release/NetPing_modern.pdb