Feature/build dll win mingw

[mgreter]

Made windows mingw compliation working:
https://ci.appveyor.com/project/mgreter/libsass/build/1.0.25
Needs sass/sassc#83 to be merged first!

[coveralls]

Coverage increased (+0.02%) when pulling 0772828 on mgreter:feature/build-dll-win-mingw into 9852e41 on sass:master.

[coveralls]

Coverage increased (+0.02%) when pulling f9f51f8 on mgreter:feature/build-dll-win-mingw into c4e03e9 on sass:master.

[mgreter]

@darrenkopp I hope you don't mind that I have taken over your project files from https://github.com/darrenkopp/sassc-win? I think it should work correctly now. Took me quite some time to figure out why it was giving me strange results with the test runner (seems ruby 1.9 was the cause). Beside that everything seems to work now. Once the PR on sassc is merged I can remove the reference to my local sassc repository!

Also the debug target on msvc throws some debug assertions, which seem to keep the build on hold forever till it times out. So I disabled the test-runner on that target.

[darrenkopp]

Yup, no worries.

[am11]

Awesome! :)

@mgreter, separately, TravisCI has beta OSX testing support too. Based on this, you would need to send them an email ([email protected]) to enable Mac testing for libsass repo. I contacted them for node-sass, but they denied saying:

I am afraid we are unable to turn the multi-OS feature for you at this time, as the repository requires multiple Node.js runtimes that are not available.

I think they might enable it for libsass, as there is no such issue.