Create a profile that can be run directly

[kewisch]

amo get <name> -p could create ready-to-run profiles with the downloaded xpi installed.

amo get <name> -p -r (or dropping -p and assuming it implicitly) could create the profile and run Firefox on it. This requires a config file, as I'd like to be able to specify the location of Firefox. I will also be creating a script that can run Firefox in the VM you are hopefully using to test add-ons.

This should very much help with full reviews.