Implement RaviartThomas and Nedelec elements

[tarrut]

Current status:

Main classes/functions:

• RaviartThomasFunction
• NedelecFunction
• DOFsComputerRaviartThomas
• DOFsComputerNedelec
• LHSintegrator_Mass_Vect
• LHSintegrator_Mass
• LHSintegrator_Stiffness_Vect
• LHSintegrator_Stiffness

Outline of the solution

• Optimize edges orientation computation
• Optimize faces orientation computation
• Mass Matrix for RT0 and N0 elements
• Use Vanilla mapping for Lagrange elements
• Unify LHS for L, RT and N
• fValues as single column
• Stiffness Matrix for RT0 and N0 elements
• Boundary conditions for RT0 and N0
• Mixed Laplacian example
• Higher order RT and N

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Assigned to:
Wingman: