OPIC score for outlinks should be based on # of valid links, not total # of 
links.
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         Key: NUTCH-230
         URL: http://issues.apache.org/jira/browse/NUTCH-230
     Project: Nutch
        Type: Improvement
    Versions: 0.8-dev    
    Reporter: Ken Krugler
    Priority: Minor


In ParseOutputFormat.java, the write() method currently divides the page score 
by the # of outlinks:

          score /= links.length;

It then loops over the links, and any that pass the normalize/filter gauntlet 
get added to the crawl output.

But this means that any filtered links result in some amount of the page's OPIC 
score being "lost".

For Nutch 0.7, I built a list of valid (post-filter) links, and then used that 
to determine the per-link OPIC score, after which I iterated over the list, 
adding entries to the crawl output.

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