Log message:
Update py-oauth2client to 2.0.0.

## v2.0.0

* Add django_util (#332)
* Avoid OAuth2Credentials `id_token` going out of sync after a token
  refresh (#337)
* Move to a `contrib` sub-package code not considered a core part of
  the library (#346, #353, #370, #375, #376, #382)
* Add `token_expiry` to `devshell` credentials (#372)
* Move `Storage` locking into a base class (#379)
* Added dictionary storage (#380)
* Added `to_json` and `from_json` methods to all `Credentials`
  classes (#385)
* Fall back to read-only credentials on EACCES errors (#389)
* Coalesced the two `ServiceAccountCredentials`
  classes (#395, #396, #397, #398, #400)

### Special Note About `ServiceAccountCredentials`:
-------------------------------------------------

For JSON keys, you can create a credential via

```py
from oauth2client.service_account import ServiceAccountCredentials
credentials = ServiceAccountCredentials.from_json_keyfile_name(
    key_file_name, scopes=[...])
```

You can still rely on

```py
from oauth2client.client import GoogleCredentials
credentials = GoogleCredentials.get_application_default()
```

returning these credentials when you set the `GOOGLE_APPLICATION_CREDENTIALS`
environment variable.

For `.p12` keys, construct via

```py
credentials = ServiceAccountCredentials.from_p12_keyfil(
    service_account_email, key_file_name, scopes=[...])
```

though we urge you to use JSON keys (rather than `.p12` keys) if you can.

This is equivalent to the previous method

```py
# PRE-oauth2client 2.0.0 EXAMPLE CODE!
from oauth2client.client import SignedJwtAssertionCredentials

with open(key_file_name, 'rb') as key_file:
    private_key = key_file.read()

credentials = SignedJwtAssertionCredentials(
    service_account_email, private_key, scope=[...])
```

Log message:
Update py-oauth2client to 1.5.2.

Needed by py-google-api-python-client-1.4.2.

## v1.5.2

* Add access token refresh error class that includes HTTP status (#310)
* Python3 compatibility fixes for Django (#316, #318)
* Fix incremental auth in flask_util (#322)
* Fall back to credential refresh on EDEADLK in multistore_file (#336)

## v1.5.1

* Fix bad indent in `tools.run_flow()` (#301, bug was
  introduced when switching from 2 space indents to 4)

## v1.5.0

* Fix (more like clarify) `bytes` / `str` handling in crypto
  methods. (#203, #250, #272)
* Replacing `webapp` with `webapp2` in `oauth2client.appengine` (#217)
* Added optional `state` parameter to
  `step1_get_authorize_url`. (#219 and #222)
* Added `flask_util` module that provides a Flask extension to aid
  with using OAuth2 web server flow. This provides the same functionality
  as the `appengine.webapp2` OAuth2Decorator, but will work with any Flask
  application regardless of hosting environment. (#226, #273)
* Track scopes used on credentials objects (#230)
* Moving docs to [readthedocs.org][1] (#237, #238, #244)
* Removing `old_run` module. Was deprecated July 2, 2013. (#285)
* Avoid proxies when querying for GCE metadata (to check if
  running on GCE) (#114, #293)

[1]: https://readthedocs.org/

## v1.4.12

* Fix OS X flaky test failure (#189).
* Fix broken OpenSSL import (#191).
* Remove `@util.positional` from wrapped request in `Credentials.authorize()`
  (#196, #197).
* Changing pinned dependencies to `>=` (#200, #204).
* Support client authentication using `Authorization` header (#206).
* Clarify environment check in case where GAE imports succeed but GAE services
  aren't available (#208).

## v1.4.11

* Better environment detection with Managed VMs.
* Better OpenSSL detection in exotic environments.

## v1.4.10

* Update the `OpenSSL` check to be less strict about finding `crypto.py` in
  the `OpenSSL` directory.
* `tox` updates for new environment handling in `tox`.

## v1.4.9

* Ensure that the ADC fails if we try to *write* the well-known file to a
  directory that doesn't exist, but not if we try to *read* from one.

## v1.4.8

* Better handling of `body` during token refresh when `body` is a stream.
* Better handling of expired tokens in storage.
* Cleanup around `openSSL` import.
* Allow custom directory for the `well_known_file`.
* Integration tests for python2 and python3. (!!!)
* Stricter file permissions when saving the `well_known_file`.
* Test cleanup around config file locations.

## v1.4.7

* Add support for Google Developer Shell credentials.
* Better handling of filesystem errors in credential refresh.
* python3 fixes
* Add `NO_GCE_CHECK` for skipping GCE detection.
* Better error messages on `InvalidClientSecretsError`.
* Comment cleanup on `run_flow`.

## v1.4.6

* Add utility function to convert PKCS12 key to PEM. (#115)
* Change GCE detection logic. (#93)
* Add a tox env for doc generation.

## v1.4.5

* Set a shorter timeout for an Application Default Credentials issue on some
  networks. (#93, #101)
* Test cleanup, switch from mox to mock. (#103)
* Switch docs to sphinx from epydoc.

## v1.4.4

* Fix a bug in bytes/string encoding of headers.

## v1.4.3

* Big thanks to @dhermes for spotting and fixing a mess in our test setup.

* Fix a serious issue with tests not being run. (#86, #87, #89)
* Start credentials cleanup for single 2LO/3LO call. (#83, #84)
* Clean up stack traces when re-raising in some places. (#79)
* Clean up doc building. (#81, #82)
* Fixed minimum version for `six` dependency. (#75)

Log message:
Add SHA512 digests for distfiles for security category

Problems found locating distfiles:
	Package f-prot-antivirus6-fs-bin: missing distfile fp-NetBSD.x86.32-fs-6.2.3.tar.gz
	Package f-prot-antivirus6-ws-bin: missing distfile fp-NetBSD.x86.32-ws-6.2.3.tar.gz
	Package libidea: missing distfile libidea-0.8.2b.tar.gz
	Package openssh: missing distfile openssh-7.1p1-hpn-20150822.diff.bz2
	Package uvscan: missing distfile vlp4510e.tar.Z

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Log message:
  Version 1.4.2

  Several small bugfixes related to six/py3 support.

Log message:
Import py34-oauth2client-1.4.1 as security/py-oauth2client.

This is a client library for accessing resources protected by OAuth
2.0.