Added enemy counter
Merge branch 'master' of https://github.com/kfweber/Smart-Zombie

# By bschalich (6) and Ozone3000 (1)
# Via bschalich
* 'master' of https://github.com/kfweber/Smart-Zombie:
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  updated platforms in world
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Conflicts:
	MyWorld.class
	MyWorld.java
	project.greenfoot