Add Player model.
Add empty files for other models
Add Resource model
Change resources model.
Change Coordinates class name.
Add planet model (incomplete)
fixed the int parameters in the setPilotSkill(), setFighterSkill(), setTraderSkill(), and setEngineerSkill().
Created methods in the Planet.java
Added the getter() and setter() for the Ship.java
Updated Universe.java

created the getters, setters, and constructor
updated constructor in Planet.java
Fix file names in nbproject
fixed the return types on the getter and setter methods.
updated scarcityLevel() method