The beginning. Initial jme project created.

Should be ready to be imported into the jMonkey SDK. Created a splash
image for the launcher.
Additional changes to initial game properties.

Set game properties to something more relavant and added some more
comments in the Game class.
Library path stuff for jenkins.

Ant needs this file to create paths to compile the game in jenkins.
Added Planet class and planet creation

Click in game to add a planet. No physics code.
- Added physics
- Added physics
- Added PlanetWorker.java
Added G and dt to gravity simulation, masses and initial velocities to planets, created a stable system, gave the planets different colours