Make a bunch of API changes.

Make a bunch of API changes.

These are generally very small; some of them are breaking, but it'll be
easy for users to change over to the new APIs.

The new APIs generally bring the package more in line with the OAuth 2.0
spec. The old API was narrowly focused on specifically connecting to
Google's servers using an authorization code grant; the new APIs should
be more flexible and consistent with more grant types.

R=rnystrom@google.com

Committed: https://github.com/dart-lang/oauth2/commit/45f3628ff045d625daccefce333fbdbd5fd1969c

[Bob Nystrom, 2015-08-26 16:52:44]

lgtm

https://codereview.chromium.org/1320523003/diff/1/lib/src/client.dart
File lib/src/client.dart (right):

https://codereview.chromium.org/1320523003/diff/1/lib/src/client.dart#newcode86
lib/src/client.dart:86: /// Thrwos an [ArgumentError] if [secret] is passed
without [identifier].
"Throws"

[nweiz, 2015-08-26 20:47:22]

Committed patchset #1 (id:1) manually as
45f3628ff045d625daccefce333fbdbd5fd1969c (presubmit successful).

[nweiz, 2015-08-26 20:47:28]

https://codereview.chromium.org/1320523003/diff/1/lib/src/client.dart
File lib/src/client.dart (right):

https://codereview.chromium.org/1320523003/diff/1/lib/src/client.dart#newcode86
lib/src/client.dart:86: /// Thrwos an [ArgumentError] if [secret] is passed
without [identifier].
On 2015/08/26 16:52:44, Bob Nystrom wrote:
> "Throws"

Done.