Update the README to match the current API.

Update the README to match the current API.

R=rnystrom@google.com
Closes #2

Committed: https://github.com/dart-lang/json_rpc_2/commit/8bf9eca481e48aad17271105d4f933d85f3b5955

[Bob Nystrom, 2015-02-05 00:32:25]

https://codereview.chromium.org/899093003/diff/1/README.md
File README.md (right):

https://codereview.chromium.org/899093003/diff/1/README.md#newcode13
README.md:13: WebSocket.connect('ws://localhost:4321').then((socket) {
Would it be premature to use await here? :)

Also, maybe put this in main() {} so it's a valid program?

https://codereview.chromium.org/899093003/diff/1/README.md#newcode28
README.md:28: // Methods can take parameters. They're presented as a
[Parameters] object which
Some long lines.

https://codereview.chromium.org/899093003/diff/1/README.md#newcode102
README.md:102: client.sendRequest("divide", {"dividend": 2, "divisor":
0}).catchError((error) {
Long.

https://codereview.chromium.org/899093003/diff/1/README.md#newcode116
README.md:116: class, which implements both `Client` and `Server`. It supports
same methods as
"same" -> "the same".

[nweiz, 2015-02-05 01:01:55]

Code review changes

[nweiz, 2015-02-05 01:02:48]

https://codereview.chromium.org/899093003/diff/1/README.md
File README.md (right):

https://codereview.chromium.org/899093003/diff/1/README.md#newcode13
README.md:13: WebSocket.connect('ws://localhost:4321').then((socket) {
On 2015/02/05 00:32:24, Bob Nystrom wrote:
> Would it be premature to use await here? :)

Yes :(

> Also, maybe put this in main() {} so it's a valid program?

Done.

https://codereview.chromium.org/899093003/diff/1/README.md#newcode28
README.md:28: // Methods can take parameters. They're presented as a
[Parameters] object which
On 2015/02/05 00:32:24, Bob Nystrom wrote:
> Some long lines.

Done.

https://codereview.chromium.org/899093003/diff/1/README.md#newcode102
README.md:102: client.sendRequest("divide", {"dividend": 2, "divisor":
0}).catchError((error) {
On 2015/02/05 00:32:25, Bob Nystrom wrote:
> Long.

Done.

https://codereview.chromium.org/899093003/diff/1/README.md#newcode116
README.md:116: class, which implements both `Client` and `Server`. It supports
same methods as
On 2015/02/05 00:32:25, Bob Nystrom wrote:
> "same" -> "the same".

Done.

[Bob Nystrom, 2015-02-05 01:09:48]

lgtm

[nweiz, 2015-02-06 00:26:22]

Committed patchset #2 (id:20001) manually as
8bf9eca481e48aad17271105d4f933d85f3b5955 (presubmit successful).