Added new script called ClimberSpawner.cs
Moved Climber.prefab ( the prototype ) to Assets/prefabs/climbers/
Created some sample climber/ghost prefabs for ClimberSpawner
Updated generation_test scene, Level prefab

Signed-off-by: explosivose <explosivose@gmail.com>
moved Fred.prefab to assets/prefabs/climbers
commented out some useless code in Hand.cs (prototype) for testing
LevelGenerator.cs has been changed to use Awake() instead of Start()

Signed-off-by: explosivose <explosivose@gmail.com>