3.13.x Refactor --get-rnapuzzle-ready into rna_standardize.py
$ rna_standardize.py rna_tools/input/comparison/*
Output: rna_tools/input/comparison/4GXY_min_std.pdb
>A:2-3
GC
Output: rna_tools/input/comparison/4GXY_min_reconstruction_std.pdb
>A:1-2
GC