Added JOINS.
Updated attributes' operation.
Added a NOT clause for IN.
Added alias for tables.
More alias and attributes test.
Changed Partial's concatenation code.
Added ListOfPartials and Select.
Added Selector, that constructs full SQLs.
Removed unused method from Partial.
Added ListOfAttributes.
Selector now creates almost full SELECT clauses.
Added alias to AND and OR.
Changed All to work with Selector.
Added support to multiple FROM clauses.
Selector now supports queries without FROM.