spaces. Fixed some typos.
(Internet Relay Chat): Explain relay.
(Getting started with rcirc): Change items to reflect prompts.
Add more explanation to rcirc-track-minor-mode and added a comment to
warn future maintainers that this section is a copy.
(Getting started with rcirc): Add notice of rcirc-track-minor-mode.
(rcirc commands): Moved /ignore command to the new chapter.
(Fighting Information Overload): New chapter documenting /keyword,
/bright, /dim, channel ignore, and low priority channels.
