Is there an updated list of commands or features as they are added to Mycroft and is so where does it reside?
The skills are pretty much the mycroft commands. You can view a list of downloadable skills from msm here https://github.com/MycroftAI/mycroft-skills.
As far as features you can look at the pull request to know what’s in the queue for the bi weekly release.
The skills (voice commands) listed here: https://docs.mycroft.ai/skills.and.features are dated July 2016. Is there a more up to date list?
Yeah that doc is outdated and does not currently reflect what mycroft can do. The best way is to look at the skills repo, and download the skills you are interested in. We are working on a new way for community members to easily add skills and document how to use their skills