v0.3.0

• Updated database files and new kwarg MCMversion for correct MCM reaction numbers
• Remove StatData; RMSE and R2 are not supported in v0.3.0
• New options to only print output to text files in j_oldpars; additional
  semicolon-separated output
• Rename kwarg O3col to DU
• On failure, don't exit Julia, only abort function and return nothing
• Rename internal functions
• Code clean-up and bug fixes

v0.2.1

• PR #5
• Improved error handling: assign Inf to sigmal, if conversion fails to avoid
  errors from LsqFit and the abortion of the script
• Fix #4

v0.2.0

Additional function j_parameters with improved parameterisations including
a dependence on the overlying ozone column. Additional csv file and pdf with
the ozone column dependence fits (lpar.pdf).

v0.1.0

Function j_oldpars to write the legacy MCM parameterisations and statistical
data to a text file and plot the parameterisations in a pdf compiled in the
folder params_<scenario name>