Merge pull request #5 from jankuca/master

update readme

respond with 404 when the static target is not a file

add parameter placeholders to routes

log HTTP requests

improve exceptions responses, show err.stack

add index.js

Nerve now uses a modified version of underscore.js to simplify the request handler.

Code formatting changes.

Replaced deprecated writeHeader call with call to writeHead.

Changed to use req.end and res.end instead of req.close and res.close; fixed bug with error handling for attempt to read a directory in serve_static_file.

Fixed issue 2 (e is not defined).

Removed use of deprecated process.mixin function.

Fixes for node 0.1.30.

brings Nerve up-to-date with Node 0.1.30 (not using Promises)