The Excel Report Design

This is slightly fixed representation of the testing table (the junit- test generates this model (see za.co.apricotdb.support.excel.TableWrapperTest).

TO DO:

* the parent table designator has to be allocated on the opposite side of the corresponding foreign key column (see the red mark);

* implement the constraints- agenda definition under the table representation;

* split the data forming algorithm to make it reusable for the graphical representation of the table (currently the whole model has been retrieved by the constructor of TableWrapper).