Log Message:
Update py-httplib2 to 0.9.2:

0.9.2:

Changes not documented.

0.9.1:

Fixes in this release:

https://github.com/jcgregorio/httplib2/pull/296

    There was a problem with headers when a binary string is passed (like
    b'Authorization').

https://github.com/jcgregorio/httplib2/pull/276

    Default to doing DNS resolution through a proxy server if present.