Update Web-site "Features" section

The page http://lucene.apache.org/solr/features.html is a long list of features. On the top, the most prominent Solr features are highlighted in a "sales-like" manner with a graphical icon and short description. Below that are sections with more in-depth descriptions of various aspects of Solr:

Data Handling, Query, Facets, Discovery, Plugins & Extensions, Statistics & Aggregations, Spatial, Rich Content, Performance, Scaling, Admin Interface

However, this page is lagging behind and should be reworked (not just add to the end) to capture and highlight recent features such as:

• Streaming Expressions
  • SQL & JDBC
  • Joins
  • Statistical engine
  • Graph
  • ML
• Auto scaling & Metrics
• CDCR and HA
• LTR
• Security
• ...more

I think perhaps a key to success is to dare to remove some content that perhaps was impressive at the time but not worthy a mention anymore