Don't explicitly send the configuration on init
Don't show the terminal size on resize
Force UTF-8 encoding and properly decode it in the browser

The encoding coming from the input IO, on my machine, is ASCII-8BIT.
This cause improper .to_json conversions. On the other hand,
VT100#vt100, has a problem displaying the decoded characters "като тези"
and wants them further encoded.

See http://ecmanaut.blogspot.ca/2006/07/encoding-decoding-utf8-in-javascript.html.