state/multiwatcher: add deserialisation support for environments
state/multiwatcher: add deserialisation support for environments

Also added actions which appears to have been missed previously.

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