Put classes into packages
Database actually working 0.1

Remove Binding - only needed in db.
Remove List/Task/UserNotFoundException - replaced by DataNotFoundException(Class).
Rename methods in Database to better match SQL actions.

Generalize creation of PreparedStatements.
Generalize setting variables to PreparedStatements.
Fix for null value in setVars
Database basic functionality finished
Implementing database finished!

Server is now to be run from `Main.java`.
`SQL JOIN` query, get all lists from userId.
Every class in db needs id too, this can be implemented in a better way. (Adds class `DatabaseEntry` to help with this)
Adds a bunch of error messages. (Errors could get better)

Modifies JSON structure for all classes, now returns the data we need.

`srv.sh` now runs with __no__ errors!