actions: use _create_fingerprint helper

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
tests: import count_codons from correct module

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
actions: Implement store action

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
actions: Implement search

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>