Added commands compatible with ST3 as of 3059

Hey,

It's been awhile! I'm finally getting around to merging my changes.

What I want to do is to have a branch in your repository for ST3 commands, while master remains for ST2. This is necessary because @wbond wants only a single package for both ST2 and ST3 commands, but a single package cannot span multiple repositories. So we get around it by using multiple branches in the same repository.

Once you accept this branch, I can submit a change to the Package Control repo so that users with ST2 will get your version from master while users with ST3 will get my version from the branch.

Brian