Steering Committee composition and operations

This post originally appeared on the Software Carpentry website.

You've hopefully seen [Belinda Weaver's post](https://software-carpentry.org/blog/2017/06/weaver_cdl.html) announcing her hire as Community Development Lead for Software and Data Carpentry, which also mentioned her stepping down from the Steering Committee. This means we (the Steering Committee) will continue our term of service with only six members. We are confident in our ability to continue our operations as normal despite this change. Thanks to Belinda for her service on the committee over the last year and a half, and we're looking forward to interacting with her in this new capacity.