Update lucene version to 4.10
Bump the index version and update the LuceneVersion
Update jetty version to 9.2.2
Merged #159 "Update lucene version to 4.10"
Merged #158 "Update Jetty version to 9.2.2"
Allow Plugins to have injected members and Extensions to be constructed
Merged #162 "Allow plugins and extensions to be injected"