User Access

Hey there,

I see there’s now a “User access” page in the settings which isn’t documented yet. How does this work? Could we use this to let employees set their own availability/vacations?

Great plugin. My wishlist is very short:
* Ability for employees to set their own availability
* Ability to select the employee you’re booking from a graphical list of photos+bios.
* Ability to set separate “Admin” message in Twilio settings, like in mail settings.
* #query_confirm#/#query_cancel# tags, which just has the query part of the URL, so we can use yourls in Twilio messages for short links.