/whisper name message

the idea is to emulate IRC's /notify functionality

You could write

    /whisper Destiny my skype name is hunter2

and only Destiny would get the message.

Whispers are distinct from future Private Messages, because they show up inline with the main chat, and they don't get saved to the database. (Whispers piggyback on the MSG code, while PRIVMSG will piggyback on chat conversations/rooms/channels).

tied to: https://github.com/destinygg/chat/pull/21

TODO:
- css to distinguish whispers from messages
- handle receiving whispers and formatting them as such (as of writing they're just handled with onMSG)
- test to make sure it all works
- fix change line endings to whatever you guys normally use. i wrote this pull on ubuntu, and i see these ^M symbols in my git diffs at the end of lines

ALSO:
- build
- minify
- things like that
Should probably add a separate handler and definitely change the styling for whispers