change nanopubs_store to nanopub_store
change nanopubs_store to nanopub_store

The latter is what is used in code.

nbargnesi/openbel-server,OpenBEL/openbel-api,nbargnesi/openbel-server,nbargnesi/openbel-server,OpenBEL/openbel-server,OpenBEL/openbel-server,OpenBEL/openbel-api,OpenBEL/openbel-server,OpenBEL/openbel-api,OpenBEL/openbel-api