Headers should be case insensitive

[timmattison]

I found this project while working on porting some servlet code over to AWS Lambda. It's pretty simple and slick, I love it.

I ran into some issues though where certain libraries are looking for header names that are in a different case than the browser sends. Technically they should be case insensitive. Have you run into this? Do you have a new version that handles this?

If not, do you mind if I fork this on my own or do you want me to do a PR against this? I see the license is PD but I wanted to ask anyway.