Website change: switch news and features for Lucene and Solr [LUCENE-3763]

[asfimport]

---

Migrated from LUCENE-3763 by Mark Miller (@markrmiller)

[asfimport]

Mark Miller (@markrmiller) (migrated from JIRA)

got some weird stuff going on when I try and build the site locally:

File content/solr/index.mdtext had processing errors: Error while rendering output to string
get http://s\.apache\.org/solrjira failed.

Once I figure out why that is happening, I've got this ready.