Updated server for Express 1.0.0; reorganized modules; updated README

* Server now works with Express 1.0.0 (beta or beta2) and Connect
* `AjaxIM` is now `Hub` and functions as both manager and session middleware
* Authentication directory structure neatened
* Development controllers and views separated into `dev/` folder
* Client-side content moved to `client/` folder
* Updated installation instructions in README

.gitignore

@@ -1,4 +1,3 @@
 local/*
 *.local.*
 *.local/
-public/