Add a script to build manylinux wheels

[asottile]

Resolves #75
Resolves #150

CC @samuelcolvin

For more on the "manylinux" spec, see the pep: https://www.python.org/dev/peps/pep-0513/

(Personal notes):

• I really don't like the manylinux spec for the way it bundles .so files into the wheel (which has security implications) -- but in our case it doesn't actually bundle any of the shared objects as these are the only things linked (yay?):

    linux-vdso.so.1 =>  (0x00007ffcab9aa000)
    libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fbfb695c000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fbfb6653000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fbfb643c000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fbfb621f000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fbfb5e56000)
    /lib64/ld-linux-x86-64.so.2 (0x00005609e2a1a000)

[samuelcolvin]

Looks good to me in principal. Perhaps push to testpypi so we can test in action?

[QuLogic]

Since you're running on Python 3; there's already a TemporaryDirectory context manager.

[asottile]

oh hey, that's great!

[asottile]

They're on testpypi: https://testpypi.python.org/pypi/libsass/0.11.1

Try these with:

pip install six && pip install -i https://testpypi.python.org/simple libsass

[coveralls]

Coverage remained the same at 94.464% when pulling 2e44223 on asottile:manylinux into a3748d8 on dahlia:master.

[dahlia]

Looks fine to me. Could we build manylinux wheels on Travis CI in the future?

[chriskuehl]

Works great for me on Debian jessie and Debian stretch (coincidentally, I was about to open an issue to ask about manylinux1 support!). Thanks!

[asottile]

@dahlia I thought about travis-ci, however it doens't really benefit us to build them there. They need to build in this special docker container and can't take advantage of the software travis-ci has installed (due to being a too-new distribution (said nobody every about precise!)). I think it probably makes sense to just run this one-off during release.

[asottile]

I've gone ahead and uploaded manylinux wheels for 0.11.1, 0.11.0 and 0.10.1 releases. If anyone wants others, let me know and I'll upload those too

[samuelcolvin]

Great, thank you very much.

Note for anyone else having problems with the non manylinux version being installed: you need an up-to-date (or recent) version of pip (pip install --upgarde pip) to get the precompiled install.