removing hard-coded config table parameters in models
testing bug fix related to standard_dg_prime_multi()
changing dg_covariance to dg_sigma (the sqrt of the covariance) in the StoichiometricModel
Adding covariance representation options to `standard_dg_prime_multi`
exposing the sqrt of the covariance matrix as an option in standard_dg_multi()
Exposing a new function ComponentContribution.standard_dg_formation(Compound)
upgrading to component-contribution 0.3.2b2
minor bug fix in version 0.3.2b3
Adding StoichiometricModel (transferred from equilibrator-pathway)
some speedups and changes to default aqueous parameters