Upgrading version to 0.13.0.

[dhermes]

$ git log -1 --pretty=%H
f227fdc96287d92ba7232f005a447b6af06a7525
$ git log 0.12.1..HEAD \
> | grep 'Merge pull request ' \
> | awk -F ' ' '{print $4}' \
> | sort

yields
#1700
#1733
#1734
#1736
#1737
#1738
#1691 didn't show up (because I merged it with GitHub's squash commit feature). If we use this feature I'll need to refine my release process to capture all PRs since the last release (maybe something already exists from GitHub that I don't know about).

[dhermes]

Left out of release notes

• Add methods to connection mapping API requests #1700 / Factor out API helper classes from 'pubsub.Connection'. #1736 (re-plumbing the API calls for Pub/Sub)
• Fix docs side-nav background. #1733 (docs CSS fix)
• Removing some YAGNI test fixtures and no cover pragmas. #1734 / Re-enabling redefined-builtin for Pylint. #1737 / Remove a stray .DS_Store file and add this to .gitignore. #1738 / Removing py26 and pandas from default tox environments. #1739 (testing changes)

Release notes

---

Monitoring API

• Added basic support for the Google Stackdriver Monitoring API (Monitoring API #1691)

---

@rimey PTAL at the release notes.

[tseaver]

LGTM. I don't think we need to mention any of the currently-excluded PRs: none of them are user-visible.

[dhermes]

@rimey I can always edit the release notes, LMK if you'd like different / more verbose content.

[dhermes]

Release has been uploaded: https://pypi.python.org/pypi/gcloud/0.13.0

[rimey]

Sorry, I was off-line for a bit. Shall I just hit the "Update release" button?

Monitoring API

• Adds the Google Stackdriver Monitoring API, with support for querying of time series, metric descriptors, and monitored resource descriptors. (Monitoring API #1691)

[dhermes]

I just updated it for you. Wasn't sure what your edit privileges would be for the release.