Gotham CORS Middleware

This library is aimed to provide CORS functionality to Gotham.rs servers.

Currently this is a very simple implementation with no customisability.

Usage: ```rust extern crate gotham; extern crate gothamcorsmiddleware;

use gotham::pipeline::newpipeline; use gothamcorsmiddleware::CORSMiddleware; use gotham::pipeline::single::singlepipeline; use gotham::router::builder::*; use gotham::router::Router;

pub fn router() -> Router { let (chain, pipeline) = singlepipeline( newpipeline() .add(CORSMiddleware) .build(), );

build_router(chain, pipeline, |route| {
 // Routes
}

} ```

Roadmap: - [x] Add integration tests - [ ] Add builder that would allow header customisation - [ ] Add documentation