Added support for OAuth 2 for devices
Allows to use another device_uri
remove prints
added missing docstrings
merged with master branch
added an OAuth2 for devices sample script
updated doc
Merge OAuth2ForDevices changes into master.

Conflicts:
	docs/epy/class-tree.html
	docs/epy/help.html
	docs/epy/identifier-index.html
	docs/epy/module-tree.html
	docs/epy/oauth2client-module.html
	docs/epy/oauth2client-pysrc.html
	docs/epy/oauth2client.anyjson-module.html
	docs/epy/oauth2client.anyjson-pysrc.html
	docs/epy/oauth2client.appengine-module.html
	docs/epy/oauth2client.appengine-pysrc.html
	docs/epy/oauth2client.appengine.AppAssertionCredentials-class.html
	docs/epy/oauth2client.appengine.CredentialsModel-class.html
	docs/epy/oauth2client.appengine.CredentialsNDBModel-class.html
	docs/epy/oauth2client.appengine.CredentialsNDBProperty-class.html
	docs/epy/oauth2client.appengine.CredentialsProperty-class.html
	docs/epy/oauth2client.appengine.FlowNDBProperty-class.html
	docs/epy/oauth2client.appengine.FlowProperty-class.html
	docs/epy/oauth2client.appengine.InvalidClientSecretsError-class.html
	docs/epy/oauth2client.appengine.InvalidXsrfTokenError-class.html
	docs/epy/oauth2client.appengine.OAuth2Decorator-class.html
	docs/epy/oauth2client.appengine.OAuth2DecoratorFromClientSecrets-class.html
	docs/epy/oauth2client.appengine.SiteXsrfSecretKey-class.html
	docs/epy/oauth2client.appengine.SiteXsrfSecretKeyNDB-class.html
	docs/epy/oauth2client.appengine.StorageByKeyName-class.html
	docs/epy/oauth2client.client-module.html
	docs/epy/oauth2client.client-pysrc.html
	docs/epy/oauth2client.client.AccessTokenCredentials-class.html
	docs/epy/oauth2client.client.AccessTokenCredentialsError-class.html
	docs/epy/oauth2client.client.AccessTokenRefreshError-class.html
	docs/epy/oauth2client.client.ApplicationDefaultCredentialsError-class.html
	docs/epy/oauth2client.client.AssertionCredentials-class.html
	docs/epy/oauth2client.client.Credentials-class.html
	docs/epy/oauth2client.client.Error-class.html
	docs/epy/oauth2client.client.Flow-class.html
	docs/epy/oauth2client.client.FlowExchangeError-class.html
	docs/epy/oauth2client.client.GoogleCredentials-class.html
	docs/epy/oauth2client.client.MemoryCache-class.html
	docs/epy/oauth2client.client.NonAsciiHeaderError-class.html
	docs/epy/oauth2client.client.OAuth2Credentials-class.html
	docs/epy/oauth2client.client.OAuth2WebServerFlow-class.html
	docs/epy/oauth2client.client.SignedJwtAssertionCredentials-class.html
	docs/epy/oauth2client.client.Storage-class.html
	docs/epy/oauth2client.client.TokenRevokeError-class.html
	docs/epy/oauth2client.client.UnknownClientSecretsFlowError-class.html
	docs/epy/oauth2client.client.VerifyJwtTokenError-class.html
	docs/epy/oauth2client.clientsecrets-module.html
	docs/epy/oauth2client.clientsecrets-pysrc.html
	docs/epy/oauth2client.clientsecrets.Error-class.html
	docs/epy/oauth2client.clientsecrets.InvalidClientSecretsError-class.html
	docs/epy/oauth2client.crypt-module.html
	docs/epy/oauth2client.crypt-pysrc.html
	docs/epy/oauth2client.crypt.AppIdentityError-class.html
	docs/epy/oauth2client.django_orm-module.html
	docs/epy/oauth2client.django_orm-pysrc.html
	docs/epy/oauth2client.django_orm.CredentialsField-class.html
	docs/epy/oauth2client.django_orm.FlowField-class.html
	docs/epy/oauth2client.django_orm.Storage-class.html
	docs/epy/oauth2client.file-module.html
	docs/epy/oauth2client.file-pysrc.html
	docs/epy/oauth2client.file.CredentialsFileSymbolicLinkError-class.html
	docs/epy/oauth2client.file.Storage-class.html
	docs/epy/oauth2client.gce-module.html
	docs/epy/oauth2client.gce-pysrc.html
	docs/epy/oauth2client.gce.AppAssertionCredentials-class.html
	docs/epy/oauth2client.keyring_storage-module.html
	docs/epy/oauth2client.keyring_storage-pysrc.html
	docs/epy/oauth2client.keyring_storage.Storage-class.html
	docs/epy/oauth2client.locked_file-module.html
	docs/epy/oauth2client.locked_file-pysrc.html
	docs/epy/oauth2client.locked_file.AlreadyLockedException-class.html
	docs/epy/oauth2client.locked_file.CredentialsFileSymbolicLinkError-class.html
	docs/epy/oauth2client.locked_file.LockedFile-class.html
	docs/epy/oauth2client.locked_file._Opener-class.html
	docs/epy/oauth2client.locked_file._PosixOpener-class.html
	docs/epy/oauth2client.multistore_file-module.html
	docs/epy/oauth2client.multistore_file-pysrc.html
	docs/epy/oauth2client.multistore_file.Error-class.html
	docs/epy/oauth2client.multistore_file.NewerCredentialStoreError-class.html
	docs/epy/oauth2client.multistore_file._MultiStore-class.html
	docs/epy/oauth2client.multistore_file._MultiStore._Storage-class.html
	docs/epy/oauth2client.old_run-module.html
	docs/epy/oauth2client.old_run-pysrc.html
	docs/epy/oauth2client.service_account-module.html
	docs/epy/oauth2client.service_account-pysrc.html
	docs/epy/oauth2client.service_account._ServiceAccountCredentials-class.html
	docs/epy/oauth2client.tools-module.html
	docs/epy/oauth2client.tools-pysrc.html
	docs/epy/oauth2client.tools.ClientRedirectHandler-class.html
	docs/epy/oauth2client.tools.ClientRedirectServer-class.html
	docs/epy/oauth2client.util-module.html
	docs/epy/oauth2client.util-pysrc.html
	docs/epy/oauth2client.xsrfutil-module.html
	docs/epy/oauth2client.xsrfutil-pysrc.html
	docs/epy/redirect.html
Pull device flow state out of the Flow object.

The initial iteration of the OAuth2ForDevices flow stored intermediate state
on the flow object itself. Rather than attach it to the flow, this change
pulls it out into its own separate object. In addition to making the Flow
object reusable, this also makes it easy to serialize and deserialize this
state, so that (for example) the flow could begin in one python process and
finish in another (even on another machine).
Update except statements to use `as` everywhere.
Require python >= 2.6, use the json module.

* Set the minimum version of python to be 2.6, since we don't need to support
  anything older anymore.

* As the first of a series of related cleanups, drop our custom json
  module (since json is in the stdlib since 2.6).
Merge pull request #36 from craigcitro/imports

Require python >= 2.6, use the json module.
Assorted import/lint cleanup.

This is mostly a cleanup around import statements and a few related pylint
issues.
Merge pull request #37 from craigcitro/imports2

More import/lint cleanup.
Drop uritemplate.

The `uritemplate` module was only used in one place, for what amounted mostly
to a string replace, so we can simply drop it. Unfortunately the `META`
variable in that file is part of the public interface, so we need to keep it
around as-is.
Merge pull request #38 from craigcitro/imports3

Drop uritemplate.
Merge OAuth2ForDevices implementation with master.

This closes #3.
Update docs.
Fix a small merge issue.

A previous cleanup switched `from collections import namedtuple` to just
`import collections`, so this needed fixed up.
Update README.md

pip is a preferred way to install 3rd party packages.