V2 combat testing

Changes in v2 :

- Add pad controls, repair & change respawn point
- Modification on combat, Rbot now look at target once in range
- Better Heat consumption and regen
- Now Rbot Dies ! Don't forget to change your respawn point ;)
- You can also regen by turning Rbot power off (take care you can't move while power off)
- Some changes on camera behaviour.

Have fun !