Office Links, Info Boxes, and 50 cal

info the other weapons and sensors which were previously blank; and finally makes the 50 caliber machine gun available as a weapon choice. Update includes versions for RSRDC and TMO as well as the stock game, and without or with the Subsim.com Narwhal mod, and some text tweaks.
This mod corrects one link in the American Career office; adds another through the desk photo; changes the torpedo info that appears via tooltip or in the info box when clicking on a torpedo; adds