Update to commands.json

Hello my well inked streamers!

This update includes a change to commands.json that makes it a bit more clear what some of the variables do.  It also includes a new variable that allows you to change if the broadcaster can always activate the function.  This is needed for when you want a function to be activated with bits!

If you're using the ink overlay and loving it I'd love to see it!  Throw out a tweet and tag @limeblossom