[Solr Wiki] Update of "HowToContribute" by SteveRowe

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

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The "HowToContribute" page has been changed by SteveRowe:
https://wiki.apache.org/solr/HowToContribute?action=diff&rev1=101&rev2=102

Comment:
update maven and intellij info

  == Eclipse ==
  See [[http://wiki.apache.org/solr/HowToConfigureEclipse|wiki page on configuring Eclipse]].
  
- == IntelliJ (9.X-13.X) ==
+ == IntelliJ (9.X-14.X) ==
  See [[http://wiki.apache.org/lucene-java/HowtoConfigureIntelliJ|the Lucene wiki page on configuring IntelliJ]] - it also covers Solr configuration.
  
  == Netbeans ==
  See [[https://wiki.apache.org/lucene-java/HowtoConfigureNetbeans|the Lucene wiki page on configuring Netbeans]].
  
  = Maven =
+ There is information about using Maven with Solr and Lucene in the source tree, at `dev-tools/maven/README.maven`.  The information differs slightly by code branch.  Here is a link to this file for the trunk version (unreleased; will be released as version 6.0 as of this writing): [[http://svn.apache.org/repos/asf/lucene/dev/trunk/dev-tools/maven/README.maven]]
- There is information about using Maven with Solr and Lucene in the source tree, at `dev-tools/maven/README.maven`.  The information differs slightly by code branch.  Here are links to this file for each Solr version:
- ||'''Solr Version''' ||'''Link to Lucene/Solr Maven build instructions''' ||
- ||4.6 ||http://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_6/dev-tools/maven/README.maven ||
- ||trunk/5.0 (unreleased) ||http://svn.apache.org/repos/asf/lucene/dev/trunk/dev-tools/maven/README.maven ||
- 
  
  = Getting your feet wet: where to begin? =
  New to Solr?  Want to find JIRA issues that you can work on without taking on the whole world?