CONVERT
Converts a netlist from one format to another.

CHECK
Checks a netlist for common errors, and creates a report file listing any 
errors discovered.  Errors checked for are:

- Repeated pin numbers.
- Repeated pin names.
- Non-numeric pin numbers (example: Q1,BASE ).
- Single pin nets.

The user is given the option of creating a new netlist with the single pin 
nets deleted and/or the non-numeric pin numbers substituted with 
numeric pin numbers.  The user must supply the non-numeric to numeric 
pin substitution file.

COMPARE
Compares two netlists and generates a report which  details the 
differences between the nets, and lists any parts which  were added or 
removed.  The netlists may be of different format.  

Only the content of the nets must match, pin order is not a factor.  If there 
is no perfect match for a net, an attempt is made to locate the closest 
matching net.

RESTORE
Compares a new version of a netlist with an old version, and creates a 
restored output netlist.  A report file is created describing any net 
renames.  The netlists must be of the same format.  

For nets in the new netlist which have a match in the old netlist, the 
netname from the old netlist is assigned to the net in the new netlist.  

For nets in the new netlist which did not have a match in the old netlist, a 
new unique netname (NCXXXX) is assigned.

WAS/IS CHECK
Checks the 'was' and the 'is' columns of a was/is listing for any
repeated reference designators.  Creates a report listing any
errors discovered.

