replaced all server-side references to socket closure in its callbacks with this
pulled all function literals out of the calls to which they were passed
removed port assignments that were specific to my environment; oops
added methods for accessing users, in case someone wants to change how that works later
added comments detailing the contents of the server
stuffed our socket into a class, barely
server sockets use their own methods instead of a callbacks object
removed redundant function definitions
cleaned up the way our server sockets setup their listeners
bugfix: replaced a rogue reference to an old closure 'socket' with 'this'
replaced another outdated identifier
Merge branch 'master' of /home/calcnerd256/workbench/repos/github/feb2012_node_talk_chat_app into incoming

Conflicts:
	chat_app/public/index.html
encapsulated users into a private variable for no good reason
removed vestigial comment
factored out redundant closures in PrivateCell
cosmetics: indentation on server's PrivateCell class
corrected parameters in setUser
Merge pull request #1 from calcnerd256/master

server module overhaul