releasing gem 1.0.4

Squashed commit of the following:

commit 6a686f246661977703fda038acc76141f694adbb
Author: Samuel Prado <darkms@gmail.com>
Date:   Fri Jan 11 13:21:40 2013 -0200

    Add changes to CHANGELOG, README and gemspec

commit be43e30b0bdb1c4206affeb40f7ac3b37d7f9e0f
Author: Samuel Prado <darkms@gmail.com>
Date:   Fri Jan 11 13:20:52 2013 -0200

    add the js_faye_url option to configuration, to use another url for faye.js file if needed