Give karma to multiple users at the same time

[atuttle]

Not sure what the syntax should be... Maybe this?

++ @ryanguill @atuttle @danskaggs

[ryanguill]

I think what we will need to do is notice the ++ and the loop over the message.parts (which is the message split on spaces) and check each part if it is a username, keeping an array until we run out of usernames. Because you could do something like ++ user user1 user2 thanks for the help!

but if you do ++ user badusername user2 it will stop at user and not pick up user2 or the bad username.

also need to combine the confirmation messages I think.

The existing pattern match here: https://github.com/ryanguill/watney/blob/master/plugins/karma.js#L364 which is /^\+1[:,\s]+.+/g I think will pick this up, but there might be a better one.