- You can use Fortran arrays as inputs, which are internally converted to C ptrs
- You can input normal Fortran strings which are internally converted to C strs
- You don't have to pass the size as an argument
- Return arrays are now Fortran allocatables arrays
- Jagged arrays are inserted/output as a single array and an array with the lengths of each dimension as opposed to cptr, cptr, size_n
- Pairs are now a (1:2,n) array that is cast into an assumed shape array in C
- `intent` keywords have been added to most variable types
- Had to create a dummy modue `fsize_m` to prevent the intrinsic `size()` being shadowed by any potential variables being named `size`

NOTES:
1. All the memory allocations in C need to be freed with a C callback otherwise we are leaking memory
2.

TODO List:
1. Add intent(out) for oint, osize, odouble
2. Add optional arguments for ierr
3. Add more generic optional arguments see Python
4. Allow for already allocated arrays to be deallocated internally