Added more robust method for visualizing undershoots/overshoots;  User defined function 'setcolors' is now only called if the user has specified 'UserColorMapping' in setplot2 or setplot3
Added comments on flag 'UserColorMapping'
Added description of flag for visualizing under/over shoots in data
Moved forestclaw flag setting to plotframe2.m
Increased number of possible random colors to choose from
Added description of flag for visualizing under/overshoots in data