Query, set or reset options specific to the surveillance
  package, similar to what options does for global settings.
surveillance.options(...)
reset.surveillance.options()reset.surveillance.options reverts all options to their default
  values and (invisibly) returns these in a list.
For surveillance.options, the following holds:
If no arguments are given, the current values of all package options are returned in a list.
If one option name is given, the current value of this option is returned (not in a list, just the value).
If several option names are given, the current values of these options are returned in a list.
If name=value pairs are given, the named options
    are set to the given values, and the previous values of
    these options are returned in a list.
Either empty, or a sequence of option names (as strings),
    or a sequence of name=value pairs, or a named list of
    options. Available options are:
A named list containing plotting color defaults.
Color of the "now" symbol in stsNC
	    plots. Default: "springgreen4".
Color of the prediction interval bars in stsNC
	    plots. Default: "orange".
Logical flag queried before running cumbersome computations in
        help file examples. For interactive() sessions,
        this option defaults to TRUE. Otherwise, long examples
        will only be run if the environment variable
        _R_SURVEILLANCE_ALL_EXAMPLES_ is set (to any value different
        from "") when attaching the surveillance package.
        This is to avoid long computations during (daily) CRAN checks.