add necessary install actions

[dlevi309]

CommCenter needs to be killed for anything to take affect

[dlevi309]

this also removes the launchctl stop com.apple.CommCenter requirement from the README

[zhuowei]

Thanks! (I was looking at how other tweaks, like https://github.com/elihwyma/commcenterpatch13, hooked CommCenter, but didn't find how they auto-restarted CommCenter)

[dlevi309]

No worries, and unrelated, but I don’t think that tweak has actually ever worked (or at least never worked for when I would try it lol), the only two tweaks out there that successfully hook CommCenter is CCPatch and TetherMe