Merge lp://staging/~mardy/signon-ui/version-0.16 into lp://staging/signon-ui

PASSED: Continuous integration, rev:124
http://jenkins.qa.ubuntu.com/job/signon-ui-ci/47/
Executed test runs:
    SUCCESS: http://jenkins.qa.ubuntu.com/job/signon-ui-trusty-amd64-ci/6
    SUCCESS: http://jenkins.qa.ubuntu.com/job/signon-ui-trusty-armhf-ci/6
        deb: http://jenkins.qa.ubuntu.com/job/signon-ui-trusty-armhf-ci/6/artifact/work/output/*zip*/output.zip

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/signon-ui-ci/47/rebuild

Submitter's checklist

    Ensure that the coding style is consistent with the project.
    Ensure that non-obvious code has comments explaining it.
    Ensure the project compiles and the test suite executes without error.
    Describe how the feature was tested.

- This release was tested by verifying that account creation works, both on the desktop and on the phone.

Reviewer's checklist

    Did the Jenkins build compile and run unit tests successfully?
    Are there appropriate tests to cover any new functionality?
    If this MR affects application requesting access to accounts:
        Run test case: ubuntu-system-settings-online-accounts/access-existing

Lander's checklist

    Any non trivial change to the code should be manually tested, by either:

        Run test case: ubuntu-system-settings-online-accounts/account-create

        Run test case: gnome-control-center-signon/account-create

Formatting sucks. To see the checklist with proper formatting and links, head to:
https://wiki.ubuntu.com/Process/Merges/Checklists/online-accounts