For (2), > Our goal is to be able to install a package using Puppet, Chef, CFengine, or something else that puts all of your code in a standard location every

For (2), > Our goal is to be able to install a package using Puppet, Chef, CFengine, or something else that puts all of your code in a standard location every time, on every server. For (3), I think it can be solved by some database migrate library?