[Lucene-hadoop Wiki] Update of "HowToContribute" by DougCutting

[Apache Wiki <wi...@apache.org>]

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The following page has been changed by DougCutting:
http://wiki.apache.org/lucene-hadoop/HowToContribute

The comment on the change is:
add some Jira guidelines

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  Committers: for non-trivial changes, it is best to get another committer to review your patches before commit.  Use "Submit Patch" like other contributors, and then wait for a "+1" from another committer before committing.  Please also try to frequently review things in the patch queue.
  
+ == Jira Guidelines ==
+ 
+ Please comment on issues in Jira, making their concerns known.  Please also vote for issues that are a high priority for you.
+ 
+ Please refrain from editing descriptions and comments if possible, as edits spam the mailing list and clutter Jira's "All" display, which is otherwise very useful.  Instead, preview descriptions and comments using the preview button (on the right) before posting them.  Keep descriptions brief and save more elaborate proposals for comments, since descriptions are included in Jira's automatically sent messages.  If you change your mind, note this in a new comment, rather than editing an older comment.  The issue should preserve this history of the discussion.
+ 
  == Stay involved ==
  
  Contributors should join the [http://lucene.apache.org/hadoop/mailing_lists.html Hadoop mailing lists].  In particular, the commit list (to see changes as they are made), the dev list (to join discussions of changes) and the user list (to help others).