pnl-1.13.0

Added

• Add missing documentation on local bases.
• Add tests for basis tensor constructors.

Changed

• For the sake of consistency, the constructors pnl_basis_create_local and pnl_basis_create_local_regular are renamed to pnl_basis_local_create and pnl_basis_local_create_regular.
• The function pnl_basis_i is not marked inline anymore.
• In functions to compute a basis derivative, first check that Df is not NULL.
• Prevent standard PnlBasis constructors to be used to create a local basis (type PNL_BASIS_LOCAL).
• Refactor PnlBasis tensor constructors to drop the recursive and copy approach.