[r=themue] bootstrap: changed help text
[r=themue] bootstrap: changed help text

The bootstrap command changed from asynchronous to synchronous
mode of operation. So the old help text doesn't match anymore.

https://codereview.appspot.com/36520043/
sinzui/juju,cherylj/juju,mikemccracken/juju,frankban/juju,dimitern/juju,bogdanteleaga/juju,ericsnowcurrently/juju,makyo/juju,marcmolla/juju,macgreagoir/juju,tasdomas/juju,sinzui/juju,sinzui/juju,Altoros/juju-cloudsigma,cherylj/juju,dooferlad/juju,mhilton/juju,anastasiamac/juju,thomnico/juju,marcoceppi/juju,reedobrien/juju,bogdanteleaga/juju,kat-co/juju,Altoros/juju-vmware,davecheney/juju,AdamIsrael/juju,frankban/juju-tmp,cmars/juju,makyo/juju,reedobrien/juju,fwereade/juju,jrwren/juju,cmars/juju,reedobrien/juju,anastasiamac/juju,howbazaar/juju,sinzui/juju,anastasiamac/juju,dimitern/juju,makyo/juju,dimitern/juju,ericsnowcurrently/juju,tych0/juju,ericsnowcurrently/juju,tsakas/juju,alesstimec/juju,kat-co/juju,tych0/juju,mattyw/juju,jrwren/juju,fwereade/juju,mhilton/juju-juju,anastasiamac/juju,alesstimec/juju,tsakas/juju,mattyw/juju,AdamIsrael/juju,mjs/juju,gabriel-samfira/juju,wwitzel3/juju,waigani/juju,kat-co/juju,bac/juju,frankban/juju,wwitzel3/juju,fwereade/juju,thomnico/juju,howbazaar/juju,macgreagoir/juju,dooferlad/juju,frobware/juju,mhilton/juju-juju,davecheney/juju,mikemccracken/juju,alesstimec/juju,bac/juju,tasdomas/juju,bac/juju,mhilton/juju-juju,frankban/juju,makyo/juju,Altoros/juju-cloudsigma,frankban/juju-tmp,mjs/juju,frankban/juju-tmp,frobware/juju,tsakas/juju,axw/juju,cmars/juju,Altoros/juju-vmware,marcoceppi/juju,mjs/juju,perrito666/juju,marcmolla/juju,alesstimec/juju,gabriel-samfira/juju,ericsnowcurrently/juju,voidspace/juju,axw/juju,mhilton/juju,cmars/juju,wwitzel3/juju,mikemccracken/juju,cloud-green/juju,axw/juju,kat-co/juju,dooferlad/juju,frankban/juju,frankban/juju,dooferlad/juju,cherylj/juju,reedobrien/juju,wwitzel3/juju,axw/juju,reedobrien/store,marcoceppi/juju,howbazaar/juju,cloud-green/juju,AdamIsrael/juju,waigani/juju,tasdomas/juju,tych0/juju,davecheney/juju,cloud-green/juju,howbazaar/juju,tych0/juju,waigani/juju,marcoceppi/juju,voidspace/juju,Altoros/juju-cloudsigma,marcmolla/juju,bz2/juju,gabriel-samfira/juju,tsakas/juju,tasdomas/juju,mjs/juju,marcmolla/juju,mhilton/juju,rogpeppe/juju,bac/juju,mjs/juju,cloud-green/juju,voidspace/juju,rogpeppe/juju,perrito666/juju,frobware/juju,bz2/juju,kat-co/juju,thomnico/juju,thomnico/juju,Altoros/juju-vmware,alesstimec/juju,Altoros/juju-cloudsigma,Altoros/juju-vmware,howbazaar/juju,mikemccracken/juju,reedobrien/juju,jrwren/juju,rogpeppe/juju,bz2/juju,macgreagoir/juju,fwereade/juju,bogdanteleaga/juju,macgreagoir/juju,voidspace/juju,mhilton/juju-juju,AdamIsrael/juju,mattyw/juju,waigani/juju,mikemccracken/juju,gabriel-samfira/juju,bz2/juju,cherylj/juju,marcmolla/juju,mattyw/juju,frankban/juju-tmp,perrito666/juju,bac/juju,dimitern/juju,dimitern/juju,gabriel-samfira/juju,bogdanteleaga/juju,mhilton/juju,macgreagoir/juju,perrito666/juju,mjs/juju,davecheney/juju,axw/juju,mjs/juju,perrito666/juju,bz2/juju,anastasiamac/juju,dooferlad/juju,ericsnowcurrently/juju