Introducing Total & Relativa Perimeter

[Toruhiyo]

• [x] Turn Dirichlet into Robin in
• [x] Update tests with Robin BC filter.
• [x] Refactor ShFunc_Perimeter into total (robin)
• [x] Create SHFunc_Perimeter relative (Neumann)
• [x] Create test for relative shapeFunc.
• [x] Merge ShFunc_Perimeter: Factory -> Total / Relative
• [ ] Remove conditional statement (addingRbinTerm & bcType) from DiffReacProb --> using default FemSettigns
• [ ] Remove preProcess from Filters

[Toruhiyo]

• Plot Perimeter's regularized density
• Print Perimeter's regularized density