PR for Fix for #83 Several types of query return no results

[rowandh]

• Created overrides for the Lucene query methods - fixes the broken parses for FieldMappingQueryParser
• Added a constructor override to FieldMappingQueryParser to allow injection of a default search field
• Added a method override CreateQueryParser(string defaultField) on LuceneDataProvider
• Obsoleted DefaultSearchProperty
• Obsoleted the FieldMappingQueryParser constructor without a default field

Not sure what approach you'd want to take to resolving the broken queries, this should cover most cases.

I missed a few test cases in my initial PR - somehow skipped over the fact that this issue affects all queries and not just queries where DefaultSearchProperty is set.

[chriseldredge]

Thanks for the high quality PR summary and fix.