CI for conda recipes

[jf---]

in order to make the conda distribution the default, we'd need to integrate CI for testing the build.

for window, we should follow OCE, where TravicCI is used for linux ( osx also works ) and Appveyor for windows.

[jf---]

look into conda-smithy or ObviousCI

[jf---]

here's a great example for conda + AppVeyor