Cherry-picking from oned to WD to include Insaf's changes: fix abin for...
Cherry-picking from oned to WD to include Insaf's changes: fix abin for mesh1d, fix taubed, modified 1d-2d section, fix get section for eta out of range
Cherry-picking from oned to WD to include Insaf's changes: fix abin for mesh1d, fix taubed, modified 1d-2d section, fix get section for eta out of range