This PR ports aprox13 to C++ using the same strategy as for iso7 in #303

Here are the fcompare results between C++ and Fortran for the test_rhs unit test:

fc_aprox13_rhs.txt

Here are the fcompare results between C++ and Fortran for the test_react unit test:

fc_aprox13_react.txt

This PR also adds input files for test_rhs for aprox13 based on test_react inputs, except I've added call_eos_in_rhs=T.

To avoid completely refactoring the rhs in aprox13, I also enabled passing arbitrary size Array1D arrays to all esum functions by making esums templated functions.

I've also run the test_rhs and test_react unit tests in debug mode and successfully got the exact same results as without debug mode.