* Add readme build to CI
* Fix pandoc import in setup.py
* Replace sponsor HTML with markdown
This loses the image centering, but can be converted to RST.
* Fix README RST conversion
- Links do not render correctly inside italics
- Add hr between image caption and section, fixes markup on older
versions of pandoc.
Version 0.11b3's setup.py had an undeclared dependency on `py2exe` when
running on Windows (see
https://github.com/transifex/transifex-client/blob/0.11b3/setup.py#L23),
which made it impossible to install without having a working `py2exe` to
begin with.
This has been fixed in 0.11 proper.
