[Pig Wiki] Update of "HowToCommit" by DougCutting

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The following page has been changed by DougCutting:
http://wiki.apache.org/pig/HowToCommit

The comment on the change is:
add Pig Review Queue

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  then they can commit the patch, otherwise the patch should be 
  cancelled with a clear explanation for why it was rejected.
  
+ The list of submitted patches is in the [https://issues.apache.org/jira/secure/IssueNavigator.jspa?mode=hide&requestId=12312187 Pig Review Queue]. This is ordered by time of last modification. Committers 
+ should scan the list from top-to-bottom, looking for patches that they feel qualified to review and possibly commit.
- ##The list of submitted patches is in the [WWW] Hadoop Review 
- ##Queue. This is ordered by time of last modification. Committers 
- ##should scan the list from top-to-bottom, looking for patches that 
- ##they feel qualified to review and possibly commit.
- ## Pig doesn't appear to have a review queue yet.  How do we set one up?
  
  For non-trivial changes, it is best to get another committer to 
  review your own patches before commit. Use "Submit Patch" like