Add .appveyor.yml

[mhils]

This PR adds an AppVeyor configuration that auto-builds lxml wheels for Python 2.7 and 3.5 on Windows:
https://ci.appveyor.com/project/mhils/lxml/build/1.0.25

If you click on the individual jobs, you can go to the artifacts tab and download the wheels from AppVeyor. I tested both the Python 2.7 and 3.5 binaries and they all seem to work 😃

[scoder]

Thanks!

[mhils]

Thanks for the quick merge! I guess you still have to sign up at appveyor.com to get builds for this repo (I can only activate them for mhils/lxml),, but that should be a two minute thing. It'd be awesome if you could upload the resulting wheels to PyPI 😊

[mvantellingen]

Can we also do this for Python 3.3 and 3.4? That would make testing libraries on windows against lxml much easier (I use it for https://github.com/mvantellingen/python-zeep/blob/master/appveyor.yml).

I can work on this, but perhaps there was a reason that 3.3 and 3.4 were excluded

[scoder]

pre-Py3.5 wheels are already available. See https://pypi.python.org/pypi/lxml/3.6.0. They should eventually become available for 3.6.1 as well. Py3.5 uses a newer C compiler, which makes it a different target than the previous versions.

Note that it's generally a good idea to specify the dependency versions in your requirements.txt file instead of relying on the latest version.

[scoder]

I tried building on appveyor, but it keeps failing:

Build started
git clone -q --branch=master https://github.com/lxml/lxml.git C:\projects\lxml
Specify a project or solution file. The directory does not contain a project or solution file.

I tried setting the configuration file name explicitly to .appveyor.yml in the settings, but that doesn't help. Any hints?

[mhils]

If you set the filename to .appveyor.yml on the website, the next commit/push should build - maybe force that by pushing a new random branch?

[mhils]

@scoder: Did you get AppVeyor to work? Is there anything I can help you with to get this going?

[scoder]

No, no change so far and I won't have time to take a deeper look any time out.

[mhils]

Excited to see manylinux wheels up on PyPi! 😃
Please let me know if I can help getting this going again.