add cropplan suffle, allow comment out cropplans, display cropplans

added shuffle-cropplan? toggle
made use of number of cropplans dynamic so that you can
comment out crop plans (and their corresponding ricestageplans).
Added output box to display current cropplans and their numbers.
Also fixed bottom two plots so that they start at 10 years on the
x axis like the top plot.
Added tick display, and changed tick name to months.