Dedalus v2.2006

Feature additions:

• New Legendre polynomial basis (77d92e5).
• Problems now support variables marked as constant in the coupled dimension (see 1D Lane Emden example) (77d92e5).
• New methods for computing CFL times based on diffusive terms in conservative and non-conservative form (6e2cec2).
• Grid spacings are now available in the parsing namespace as e.g. 'sx' for the 'x' dimension (71219d1).
• Number of tau rows removed per equation can now be specified with the 'tau' keyword in Problem.add_equation (ce8c131).
• New command-line options get_config and get_examples for copying the configuration file and example scripts (cc0373e).

Behavior modifications:

• Default value of 'ncc_cutoff' changed from 1e-10 to 1e-6 to produce more banded NCC matrices (7efb884)
• Default value of 'entry_cutoff' changed from 0 to 1e-12 to prevent rounding errors from reducing matrix sparsity (7efb884).
• Hermitian symmetry for real problems is now explicitly enforced every 100 iterations by default. This can be modified via the 'enforce_real_cadence' keyword for IVP solvers (5b3be57).

Performance changes:

• Improved strategy for reducing the number of transforms when evaluating RHS terms (0ce1482).