Fix prefix wrapping again

nowrap is not enough because it still breaks on hyphens sometimes. But
since we're using pre now, we need to make sure no whitespace/newline is
around each <span> because they will be outputted.
Make the buffer text a little higher over the input bar

This is because the glow around the input bar falls a little bit over
the buffer text and it's annoying.
Add Terminus and Inconsolata to default fonts
Decrease bufferlines font size
plugins: (youtube) make video preview slicker
plugins: (image) support fukung.net

Links to http://fukung.net/v/foobar.gif end by the actual image
extensions, but the full image path is under
http://media.fukung.net/imgs/foobar.gif.

This commit replace the URL prefix if it matches fukung.net/v/.
Handle wrong password. Fixes #4.

This commit introduces a way to handle wrong password.

The only way to know it is by sending an other message after the init
one.
If we receive an answer to this second message id then we know we are
connected with the good password, otherwise we will received an onclose
event from the websocket.
13px is way too small, if anything it should be bigger