[Solr Wiki] Trivial Update of "HowToContribute" by ErickErickson

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The "HowToContribute" page has been changed by ErickErickson:
http://wiki.apache.org/solr/HowToContribute?action=diff&rev1=62&rev2=63

Comment:
Changed the codestyle links to work.

  svn diff | (cd ../otherbranch; patch -p0)
  }}}
  = Helpful Resources =
- The following resources may prove helpful when developing Solr contributions.  (These are not an endorsement of any specific development tools)
+ The following resources may prove helpful when developing Solr contributions.  (These are not an endorsement of any specific development tools, but Eclipse and IntelliJ seem to be the most popular)
  
-  * [[attachment:Eclipse.3.2.codestyle.xml|Eclipse 3.2 codestyle.xml file for Solr's coding conventions]]
-  * [[attachment:IntelliJ.codestyle.xml|IntelliJ IDEA codestyle.xml file for Solr's coding conventions]]
+  * [[http://www.eclipse.org/|Eclipse]] ([[http://people.apache.org/~rmuir/Eclipse-Lucene-Codestyle.xml|Eclipse codestyle]])
+  * [[http://www.jetbrains.com/idea/|IntelliJ]] ([[http://people.apache.org/~erick/Intellij-Lucene-Codestyle.xml|IntelliJ codestyle]])
  
  <!> [[Solr1.3]] If you are using eclipse to follow trunk (leading up to the 1.3 release) eclipse will give several errors about not resolving components in the solrj library. This will appear in the org.apache.solr.handler.component package relating to distributed search (sharedrequest.java ...etc) The solution is to compile the solrj library via the dist-solrj target and add them to your eclipse build path. After running the dist-solrj target look in dist/solrj-lib and add apache-solr-solrj-1.3-dev.jar and commons-httpclient-3.1.jar to your buildpath.