Extends JsonWebSignature to support verification with X.509 certificates.

Extend JsonWebSignature to support verification with X.509 certificates;
JsonWebSignature: add support for using the system default trust manager;
Log content encoding at HttpRequest if there's one;
Use BufferedOutputStream in GZipEncoding;
Add error message to precondition check in setChunkSize;
Expose the ability to customize the creation of HttpURLConnection instances for NetHttpTransport;

[wonderfly, 2015-01-06 23:53:48]

Ping.

[jasonmheim, 2015-01-07 13:13:22]

This looks fine to me, but I've never done a review in Reitveld before - do
I simply publish a comment that reads LGTM or is there a checkbox somewhere
that I'm missing?

On Tue, Jan 6, 2015 at 6:53 PM, <wonderfly@google.com> wrote:

> Ping.
>
> https://codereview.appspot.com/187060043/
>

[jasonmheim, 2015-01-07 17:29:06]

LGTM

[molnar, 2015-01-07 17:39:53]

LGTM