Optionally turn off use of table aliases

[caseycesari]

In a join, If you need to preface an ambiguous field with a table name in a handwritten expression, you have to use the table alias, i.e. alias.FieldName. If the join order changes, the alias changes. It would be better to use TableName.FieldName, but once an alias is declared for a table, you can no longer reference the table by name.

There should be an option to turn table aliases off for joins. I'm not exactly sure at the moment where this would be passed, though.

[maurizi]

For reference, the code which creates the SELECT statements (and thus the table alises) is https://github.com/azavea/net-dao/blob/nuget/SQL/SqlDaJoinableLayer.cs#L111-L188