Add an interface for the charmstore client functionality used in Juju.
Add an interface for the charmstore client functionality used in Juju.

frankban/juju,bogdanteleaga/juju,kat-co/juju,bac/juju,perrito666/juju,mikemccracken/juju,gabriel-samfira/juju,dooferlad/juju,macgreagoir/juju,marcmolla/juju,bogdanteleaga/juju,mjs/juju,kat-co/juju,reedobrien/juju,bac/juju,bac/juju,alesstimec/juju,gabriel-samfira/juju,frankban/juju,axw/juju,gabriel-samfira/juju,macgreagoir/juju,perrito666/juju,waigani/juju,AdamIsrael/juju,frankban/juju,bogdanteleaga/juju,ericsnowcurrently/juju,kat-co/juju,bac/juju,mikemccracken/juju,mikemccracken/juju,marcmolla/juju,mjs/juju,waigani/juju,makyo/juju,mjs/juju,frankban/juju,waigani/juju,ericsnowcurrently/juju,reedobrien/juju,howbazaar/juju,dooferlad/juju,ericsnowcurrently/juju,dimitern/juju,alesstimec/juju,perrito666/juju,macgreagoir/juju,makyo/juju,makyo/juju,dooferlad/juju,bogdanteleaga/juju,mjs/juju,anastasiamac/juju,bz2/juju,marcmolla/juju,macgreagoir/juju,dooferlad/juju,bac/juju,axw/juju,AdamIsrael/juju,howbazaar/juju,AdamIsrael/juju,mjs/juju,gabriel-samfira/juju,bz2/juju,marcmolla/juju,howbazaar/juju,axw/juju,marcmolla/juju,gabriel-samfira/juju,waigani/juju,reedobrien/juju,dimitern/juju,howbazaar/juju,perrito666/juju,alesstimec/juju,anastasiamac/juju,makyo/juju,alesstimec/juju,kat-co/juju,bz2/juju,axw/juju,macgreagoir/juju,mikemccracken/juju,dimitern/juju,ericsnowcurrently/juju,ericsnowcurrently/juju,reedobrien/juju,dimitern/juju,mjs/juju,mikemccracken/juju,kat-co/juju,howbazaar/juju,perrito666/juju,dooferlad/juju,anastasiamac/juju,AdamIsrael/juju,axw/juju,mjs/juju,alesstimec/juju,frankban/juju,bz2/juju,anastasiamac/juju,dimitern/juju,reedobrien/juju,bz2/juju,anastasiamac/juju