Multi-line messages cause UI glitches

[brannondorsey]

When a message is sent terminal-kit is used to clear the message buffer from the user's screen. It does this by removing one line, however if the message is longer than one line, only the bottom line is cleared.

[brannondorsey]

It appears that multi-line messages aren't handled well on the receiving end either, as the user's prompt is not redrawn after receipt.