Added ability to click nick names in chat

Clicking another user's nick name in a chat window will now insert there
nick name into the message currently being written to make it easier to
address people.
Added a "mention" option to the context menu

Added a new "mention" option to the context menu for the user list which
will allow users to mimic the same functionality as if they clicked a
user's nick name in the channel.
Added ability to click channel names in chat

Channel names can now be clicked in received and sent messages in order
to quickly join a channel.

If attempting to join a channel that one is already a part of, that
channel will now automatically switch to being the active channel that
the user is participating in.
Added Chris West to the list of contributors

Added Christ West to the list of contributors for his JavaScript
prototype found at
http://cwestblog.com/2011/07/25/javascript-string-prototype-replaceall/
Update README.md

Added Christ West to the list of contributors for his JavaScript
prototype found at http://cwestblog.com/2011/07/25/javascript-string-prototype-replaceall/
Fixed an issue with linking "&" channels
Pulled changes in from the master branch
Merge pull request #29 from rastating/enhancement/chromium-marshal

Enhancement/chromium marshal