Added processing of angle in matlab script coarse2fine.m

[arango]

Added the processing of curvilinear angle to nesting processing script coarse2fine.m. Around line 152, we now have:

if (curvilinear),
  field_list = [field_list, 'dmde', 'dndx'];
end

if (got.angle),
  field_list = [field_list, 'angle'];
end

if (got.x_rho && got.y_rho),
  field_list = [field_list, 'x_rho', 'y_rho'];
end

Many thanks to John Wilkin for bringing this to my attention.