MARTY-1.3

This release includes:

• General Fierz identities to extract the Wilson coefficients of 4-fermion operators.
• Refactored diracology (new SGL module created for the occasion: Symbolic Gamma-matrices Library).
• New Standard Model, build from high-energy Lagrangian and much more reliable.
• Calculation pipeline refactored, more utilities to isolate specific contributions in amplitudes.
• Several bug fixes.