Results 4 issues of TheTurkeyDev

Barriers should only be "broken" by zombies that are nearby it. They shouldn't be tied to specific spawners

enhancement
Issue Accepted

Should we use shifting as the mechanic to repair barriers instead of breaking a sign?

enhancement
Needs Feedback

@insideintel pointed out that spawn points aren't going away. Made a fix [here](https://github.com/TheTurkeyDev/Call_Of_Minecraft-Zombies/pull/102#issuecomment-863730518), but there's still a bigger underlying issue

bug

Along with Signs, Power should be able to be activated with levels, buttons, etc... Add text above to show they are "power"

enhancement
Issue Accepted