Update

Correct side lenght variable name
Rename FUsetup to UFilterSetup
Rename OCompliance to ObjCompliance
New file ObjVolume.m
Rename MURectangle2 to UMeshRectangle2
New file: UFactoryStrucutre

Utility function that creates a struct representind the strucutre
(mesh, bc, etc)
Update OptOC2.m

Now takes a struct as input representing the strucutre that is supposed
to be optimized.
Update ex1_OC2_mbb.m

Updated to fit with new input scheme for OptOC2.m