ohttpd: Objective-C HTTP server

This is a full-fledged HTTP server written in Objective-C. It have the following parts:

* CGIKit.4: CGIKit.framework (OS X) / libCGIKit.so.4 (Linux)
  This is the new CGIKit, which is the core library the entire server and its architecture runs on.

* ohttpd
  This is the server executable. It is a simple stub that calls into CGIKit.

* Various CGI*Module
  These are modules for CGIKit server, including static files, bundles, and directory listing.

* CGIInfo
  A bundle running under CGIBundleModule, phpinfo() equilivent;