Now, server can be properly configured with a 404 page.

+ reworked the "url-to-filesystem mapping" logic to make the duplicate operation more obvious (read: ripe for refactoring)

Also:
+ included the node.js 0.10.8 sources to improve code completion feature in IDEA
+ all build-generated files are now ignored by git.
+ build script clears the screen to make reading the output easier.