Add 'rm' subcommand to ejtp-identity ($25)

[MaddieM4]

While actually playing around with the script, I discovered I missed one obvious, important feature in the spec for #122: the ability to delete identities.

$ ejtp-identity list
mitzi@lackadaisy.com (rsa)
victor@lackadaisy.com (rsa)
atlas@lackadaisy.com (rsa)
$ ejtp-identity rm victor@lackadaisy.com
$ ejtp-identity list
mitzi@lackadaisy.com (rsa)
atlas@lackadaisy.com (rsa)

Should be able to take any number of arguments, one per identity to be deleted, and print a warning for identities that don't exist.

[MaddieM4]

Bounty is $25.

http://www.freedomsponsors.org/core/issue/230/add-rm-subcommand-to-ejtp-identity

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(Copied from acceptance criteria)

Add an 'rm' subcommand that takes a variable number of identity names, deletes each identity from the relevant cache files, and prints a warning for identities that are specified but don't exist in the cache.

[iurisilvio]

What happens if an identity exists in more than one file? Removed all identities with the same name or just the first one?

[MaddieM4]

My current inclination: die with a warning that you would be deleting from the following files: <list of files>, and recommend either:

• use --cache-source=FILENAME to specify which file to delete from,
• or use -A to delete from all sources.

So if you know you want to delete Joe from all your sources, you can do ejtp-identity rm joe@blow.net -A.