Create ewl.yml

[william-gross]

[daveaglick]

Thanks! This looks like a product-specific blog feed. I'm going to leave this open for a little while - it's in the same boat as a couple other blog PRs like #191 until #175 is implemented. The idea is that project-specific feeds should be associated directly with the project. Otherwise, we'll risk overrunning the general feed with lots of project-specific posts and the more general ecosystem posts may get drowned out.