Make package for conda-forge

[brendanf]

@heibl I'm packaging ips for conda-forge. You don't have to do anything, but I'll add you as a recipe maintainer if you are interested.

In practice, there is very little to do to maintain R package recipes on conda-forge. There is a bot which will notice whenever you publish a new version on CRAN. It then updates the recipe accordingly and creates a pull request. If you are a maintainer, you'll get notified when that happens and the results of automated testing, and can take whatever actions are necessary (typically accept the pull request). Of course maintainers also get notifications if someone reports issues with the package on conda-forge.

[heibl]

@brendanf OK, sounds good. I hope I will be able to fulfill my duties ... ;)