v0.924

Notes for 0.924 release:

Updated second derivatives of the pressure for the particle clases and updated the eos_had_skyrme class to compute second derivatives.

Created a new system for OS detection to make compilation a bit more user-friendly. HDF5 headers have been reworked a bit accordingly.

Improved integration between acol and o2sclpy.

Improved the handling of aliases in acol and cli.

Generalized convert_units, several of the integration classes, a few derivative and solver classes, and several of the particle classes to templates to allow for other floating point types.

Improvements to the ex_mmin example and the example plots. Created new example ex_fermion_summ.

Improvements to the ode_iv_solve_grid class.

Improved error handling for calculator class.

Created functions vector_refine(), file_exists(), and o2isfinite().

Created classes inte_tanh_sinh_boost, inte_sinh_sinh_boost, inte_kronrod_boost, inte_exp_tanh_boost, nucmass_gen, and frib_mex.

Created a couple_threads option and an ac_coeffs() function for mcmc_para.

Creating strings_spec() for string list specifications and updated vector_spec() and mult_vector_spec().

Improved tabulate option for tov_love::calc_y().

Updated constants for CODATA 2018 release.