More polishing

[imDaniX]

This is my latest PR for a while.

1. Some more of those encapsulations and move-arounds like from the latest PR.
2. Remove some of spaghetti code from the commands to increase readability.
3. Added more TODOs for future changes.

It's possible to resolve issue #1 right now, but the problem is the data package - if we'll add the feature right now, it will be much harder to rework the package later. I think it should be generally recoded from scratch with OOP style in mind.

[WiIIiam278]

This is great stuff! Thanks again - i'll merge this in the morning.
On #1 and the data package, I definitely agree that it needs a total rewrite; it's pretty bad code right now and I have SQL syntax being shared across SQLite and mySQL which is definitely a bad idea. Moving it off the main thread will be a big boost to performance on servers with slow databases as that can cause big lagspikes at the moment.

I'm probably going to look towards #13 soon as my next project, which involves adding some more plugin messages and handlers to track a list of all players on HuskHomes installed servers. The refactoring you've done will make life a lot easier there 👍
Thanks again.