Support some form of /ignorepattern

[candera]

Because I think regexes are a bad fit for the command line, I removed the /ignorepattern switch. Unfortunately, this is a breaking change, since at least one person is using it. I need to add something back in to support at least globbing, if not regexes, or else release hobocopy as 2.0.

[candera]

Actually, even if I support globbing and not regexes, hobocopy still needs to rev the major version number.

[candera]

Another vote for this here: http://groups.google.com/group/hobocopy/browse_thread/thread/d617b46c23ede0bc

[candera]

Comment from the mailing list:

2. While any exclusion capability is better than none,
   I feel exclusion at the directory level is needed.
   How else to exclude System Volume Information and
   all the files in the Temp directory?  I agree that
   regexp seems excessive for HoboCopy.  For a happy
   medium, here is a suggested list, ordered by
   increasing capability (i.e. more work on your part).

(your suggestion)
 Exclusion by full path/filename
   DirA\Dir2\FilenameX.typ
   DirA\Dir2\FilenameZ.typ

(my request)
 Exclusion by partial path
   DirA\Dir2

 Exclusion by substring match
   Dir2
     -or-
   Dir2\Filena

 Inclusion as above

 Exclusion & Inclusion as above
   with position in command line determining
     override of previous selections
        -or-
     order of filtering