* deprecate fisheries in change_f for fleets to match other functions
* allow for list input in change_f like other functions
* 2 new internal functions to extrapolate list arguments to data frames,
with internal checking of lengths
* internal check that all fleets / year combinations have a dummy catch
value in the OM data file otherwise if entries are specified in the control
file but not present in the data file they will be ignored
* more information added to documentation for change_f
* sets up change_f for use with simdf, which is to come