provider/ec2: better names, comments
provider/ec2: better names, comments

thomnico/juju,axw/juju,mjs/juju,mikemccracken/juju,perrito666/juju,tych0/juju,mhilton/juju,kat-co/juju,howbazaar/juju,waigani/juju,bz2/juju,mikemccracken/juju,cmars/juju,fwereade/juju,mjs/juju,makyo/juju,reedobrien/juju,mikemccracken/juju,mhilton/juju,tasdomas/juju,mikemccracken/juju,AdamIsrael/juju,anastasiamac/juju,davecheney/juju,bac/juju,perrito666/juju,cherylj/juju,frankban/juju-tmp,howbazaar/juju,mhilton/juju-juju,tsakas/juju,alesstimec/juju,cherylj/juju,macgreagoir/juju,mjs/juju,dooferlad/juju,fwereade/juju,cherylj/juju,AdamIsrael/juju,alesstimec/juju,tasdomas/juju,dimitern/juju,dimitern/juju,waigani/juju,cloud-green/juju,reedobrien/juju,davecheney/juju,marcmolla/juju,wwitzel3/juju,reedobrien/juju,wwitzel3/juju,frankban/juju-tmp,frankban/juju,gabriel-samfira/juju,makyo/juju,bac/juju,mhilton/juju-juju,davecheney/juju,thomnico/juju,perrito666/juju,waigani/juju,ericsnowcurrently/juju,Altoros/juju-cloudsigma,sinzui/juju,cmars/juju,dooferlad/juju,anastasiamac/juju,dimitern/juju,perrito666/juju,mhilton/juju,tsakas/juju,bz2/juju,reedobrien/juju,macgreagoir/juju,dooferlad/juju,cherylj/juju,perrito666/juju,tasdomas/juju,marcmolla/juju,reedobrien/juju,marcmolla/juju,ericsnowcurrently/juju,dimitern/juju,sinzui/juju,bac/juju,anastasiamac/juju,cloud-green/juju,bogdanteleaga/juju,gabriel-samfira/juju,thomnico/juju,ericsnowcurrently/juju,cmars/juju,marcmolla/juju,gabriel-samfira/juju,Altoros/juju-cloudsigma,howbazaar/juju,fwereade/juju,mjs/juju,macgreagoir/juju,makyo/juju,AdamIsrael/juju,tych0/juju,howbazaar/juju,fwereade/juju,frankban/juju-tmp,bz2/juju,axw/juju,cloud-green/juju,wwitzel3/juju,cloud-green/juju,anastasiamac/juju,bogdanteleaga/juju,dooferlad/juju,mjs/juju,marcmolla/juju,howbazaar/juju,bac/juju,mjs/juju,bogdanteleaga/juju,alesstimec/juju,axw/juju,macgreagoir/juju,tasdomas/juju,AdamIsrael/juju,Altoros/juju-cloudsigma,dooferlad/juju,voidspace/juju,voidspace/juju,wwitzel3/juju,macgreagoir/juju,davecheney/juju,tych0/juju,bac/juju,makyo/juju,gabriel-samfira/juju,waigani/juju,kat-co/juju,mhilton/juju-juju,bz2/juju,dimitern/juju,tsakas/juju,anastasiamac/juju,axw/juju,cmars/juju,tych0/juju,tsakas/juju,voidspace/juju,mhilton/juju,thomnico/juju,frankban/juju,frankban/juju-tmp,mikemccracken/juju,alesstimec/juju,sinzui/juju,ericsnowcurrently/juju,sinzui/juju,alesstimec/juju,frankban/juju,Altoros/juju-cloudsigma,gabriel-samfira/juju,mjs/juju,mhilton/juju-juju,kat-co/juju,frankban/juju,axw/juju,kat-co/juju,bogdanteleaga/juju,bz2/juju,voidspace/juju,frankban/juju,ericsnowcurrently/juju,kat-co/juju