-Working implementation of ISAAC-based session keys
-Incorporated notes from [Doug Hoyte's Perl implementation](https://github.com/hoytech/Session-Token)
-Included isaac session-key generator
-buffer! now checks for buffers that are too big on every char read
-Merged define-closing-handler and define-stream-handler. They're now both define-handler (with an additional keyword arg that specifies whether to close the socket or not)
-new-session-hook! is now a method rather than a macro. It takes a function rather than just a function body
-start now takes an optional host argument (defaults to usocket:*wildcard-host*, which is #(0 0 0 0))
-House now exports path->uri
-Debug mehtods now output the session-token of an incoming request
Merge branch 'isaac-session-key-generator'
-Added documentation to README