Order of operations issue with Packed64
Correct for unfortunate find/replace
Fix one bug with FST
Port MultiFieldQueryParser

Contrib.QueryParsers.Classic now complete
Port QueryParsers.Ext namespace
Port AnalyzingQueryParser
Port ComplexPhraseQueryParser
Work in progress on QueryParsers.Flexible
Finish QueryParsers.Flexible.Core namespace
Started porting QueryParsers.Flexible.Standard
Some work on Flexible.Standard
Port numeric query nodes
Merge branch 'branch_4x' of https://github.com/paulirwin/lucene.net into branch_4x