added support for Where in the memory adapter
Added support for the compensation of the main select clauses in the memory adapter.
fixed some boundary/ null value exceptions
--> add compensation for the POLT clause, too.
Added default (neutral) clauses to the compensation query. they act as place holders with no effect, just to reduce the number of null checking and exceptions.
in the compensation query construction phase, a check is added to be sure whether the clauses are real or neutral.
Added support for indirect (multi level) dependency between statements. When a statement's source is a variable, the upper master statements are searched to determine the proper perspective.
The same concept happens during the adapter preparation in the DefaultDataAdapter.java.

Added the support for ordering in the default adapter.
improving chart labeling