Exposing Functions in kmer.cpp

A project I'm working on depends on some of the old functions that were in low_level.hpp which now have equivalents in kmer.cpp such as base_forward_hash, next_forward_hash, base_reverse_hash, next_reverse_hash, etc. I was wondering if you could expose these helper functions defined and implemented at the top of kmer.cpp so they could be called directly from the nthash namespace. 
Thank you.