Comestible grammar feast

I made some grammar fixes to comestible descriptions. My goal was to improve the grammar while preserving the tonality of the original descriptions. Along with general sentence structure, I focused on correcting restrictive/non-restrictive clauses, punctuation before conjuctions, compound adjectives, comma splices, and fixing the irradiated fruit descriptions.
Oats and wheat are different grains IME.

While you're in the file, feel free to give the cereals more descriptive names, too.  (Just in case: leave the "id" fields alone; messing with those causes none-items.  I've made that mistake before.)