More work on SmartArt.

done;
* fixed ConstraintAtom::applyConstraint
* introduced LayoutNodeAtom::fetchLayouts

current state of the diagram-type;
* me07_horizontal_bullet_list.xlsx looks fine
* me07_basic_block_list.xlsx looks fine
* me07_basic_process.xlsx arrows wrong
* me07_vertical_process.xlsx arrows wrong
* me07_block_cycle_diagram.xlsx arrows wrong
* me07_nondirectional_cycle.xlsx arrows wrong
* me07_venn_diagram.xlsx spacing between circles is wrong
* me07_basic_radial.xlsx centered circle is to large
* me07_basic_pie.xlsx applyAdjustment() needs fix for rotation