Giving MCServer a version number

[worktycho]

The problem is that we cannot calculate the version numbers from git. Unless you want a horrible script that only works when the git command line tools are installed. So we would need to implement a versioning cycle. Then we have to decide when we bump the version? If its every commit we get different versions. If its every merge it makes PR's more work to merge because we cant use the github ui. If its periodically it will hardly ever happen. If its on a major change what counts as a major change?

It would be far more useful at the current stage of development to return the commit id.