Update to Nutrient Timing

I've updated Nutrient Timing with a couple of diagrams that show what happens if you do or don't refuel within 45 minutes of finishing your training. With the refueling, your muscles stay insulin sensitive, which is a good thing, but without the fuel they actually become insulin resistant. I am writing up a Wiki entry on Insulin Resistance, so stay tuned. http://goo.gl/XobDb