Googleads

* AdWordsClient's initializer no longer requires the user_agent field. This
field is also now validated to ensure that it only contains ASCII characters.
* Removed support and examples for AdWords v201601.
* Removed upgrade_ad_url example for AdWords v201605 and v201607.

* Removed support for DFP v201505.
* Added support for DFP v201608.
* Removed examples for DFP v201508 and v201511.

* Added support for AdWords v201607.

* Removed support and examples for AdWords v201509.
* The AdWords ReportDownloader now accepts a "client_customer_id" keyword
argument that overrides the default client customer ID.
* For utilities such as the ReportDownloader or BatchJobHelper, data points
about usage are now sent in the user-agent of API requests by default. This
can be disabled with the new include_utilities_in_user_agent configuration in
the googleads.yaml file.
* Added a new parallel_report_download.py example.
* Resolved issues:
Issue 122: https://github.com/googleads/googleads-python-lib/issues/122
Issue 123: https://github.com/googleads/googleads-python-lib/issues/123

* Added support for AdWords v201605.
* Added new use_raw_enum_values keyword argument to the AdWords ReportDownloader
utility.

* Add support for DFP v201605.
* Removed examples for DFP v201505.
* Removed support for DFP v201502.
* Improved proxy support.
* BREAKING CHANGE: The googleads.common.LoadFromStorage function has been
updated to accommodate the current proxy support. This will break users with
a proxy configured. Check out the changes in our sample googleads.yaml file
to see the new format.