Reorganise and harmonise Curl/CurlCache/Cache.
Add EREGANSU_DEBUG_AUTOLOAD
Only add curl.php to autoloader if the cURL extension is present.
Remove useless check for cURL, replace with an exception-throwing check in Curl::__construct()
Add skeleton replacement RDF implementation.
Clean up autoload map
Add URI::$stringifyAsPath; process paths in the same way that Request does.