Documentation

- 2 functions in NumberCard.java
- 2 functions in OperationCard.java
- 7 functions in MySQLAccess.java (some i didn't know)
- 1 function in CardPanel.java
- 3 functions in CompMover.java
- 1 function in MathGame.java
- 2 functions in OperationPanel.java
- 3 functions in SidePanel.java
- 1 function in WorkspacePanel.java