Trailing slashes in URLs

[fatadel]

I've found an issue while working on #11.
Any URL with a trailing slash leads to 404 Not Found.
However, http://127.0.0.1:9090/my-thing and http://127.0.0.1:9090/my-thing/ must be the same URL.

This can lead to incompatibility issues with node-wot as well.