SlowBuffers are not handled correctly with send.

[tyrda01]

When using your canvas project, sending a canvas buffer (which is a SlowBuffer in node) results in a json object being sent. The following patch to respond.js appears resolve this issue.

71c71
<       if (Buffer.isBuffer(body)) {

---
>       if (body instanceof Buffer) {
90c90
<     this.header('Content-Length', Buffer.isBuffer(body)

---
>     this.header('Content-Length', body instanceof Buffer

[tj]

Fixed SlowBuffer support. Closed by 5da0163

[tj]

thanks man